diff --git a/Pipfile b/Pipfile
index 76e7c31..2bf247a 100644
--- a/Pipfile
+++ b/Pipfile
@@ -25,6 +25,7 @@ pytest = "*"
 sphinx = "*"
 mypy = "*"
 pytest-asyncio = "*"
+psutil = "*"
 
 
 [scripts]
diff --git a/Pipfile.lock b/Pipfile.lock
index 1240283..a9c47d4 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -1,7 +1,20 @@
 {
     "_meta": {
         "hash": {
-            "sha256": "009981da035bb5cf4cb234d42c53269baf6642737259c3933d134cd9dbd2f8ec"
+            "sha256": "e43fea1bf779c3be1ffe88493cd840abb13135df99429de6dce896323cb1bbd8"
+        },
+        "host-environment-markers": {
+            "implementation_name": "cpython",
+            "implementation_version": "3.6.4",
+            "os_name": "posix",
+            "platform_machine": "x86_64",
+            "platform_python_implementation": "CPython",
+            "platform_release": "16.7.0",
+            "platform_system": "Darwin",
+            "platform_version": "Darwin Kernel Version 16.7.0: Wed Oct  4 00:17:00 PDT 2017; root:xnu-3789.71.6~1/RELEASE_X86_64",
+            "python_full_version": "3.6.4",
+            "python_version": "3.6",
+            "sys_platform": "darwin"
         },
         "pipfile-spec": 6,
         "requires": {},
@@ -16,8 +29,8 @@
     "default": {
         "beautifulsoup4": {
             "hashes": [
-                "sha256:11a9a27b7d3bddc6d86f59fb76afb70e921a25ac2d6cc55b40d072bd68435a76",
                 "sha256:7015e76bf32f1f574636c4288399a6de66ce08fb7b2457f628a8d70c0fbabb11",
+                "sha256:11a9a27b7d3bddc6d86f59fb76afb70e921a25ac2d6cc55b40d072bd68435a76",
                 "sha256:808b6ac932dccb0a4126558f7dfdcf41710dd44a4ef497a0bb59a77f9f078e89"
             ],
             "version": "==4.6.0"
@@ -37,15 +50,15 @@
         },
         "chardet": {
             "hashes": [
-                "sha256:84ab92ed1c4d4f16916e05906b6b75a6c0fb5db821cc65e70cbd64a3e2a5eaae",
-                "sha256:fc323ffcaeaed0e0a02bf4d117757b98aed530d9ed4531e3e15460124c106691"
+                "sha256:fc323ffcaeaed0e0a02bf4d117757b98aed530d9ed4531e3e15460124c106691",
+                "sha256:84ab92ed1c4d4f16916e05906b6b75a6c0fb5db821cc65e70cbd64a3e2a5eaae"
             ],
             "version": "==3.0.4"
         },
         "cssselect": {
             "hashes": [
-                "sha256:066d8bc5229af09617e24b3ca4d52f1f9092d9e061931f4184cd572885c23204",
-                "sha256:3b5103e8789da9e936a68d993b70df732d06b8bb9a337a05ed4eb52c17ef7206"
+                "sha256:3b5103e8789da9e936a68d993b70df732d06b8bb9a337a05ed4eb52c17ef7206",
+                "sha256:066d8bc5229af09617e24b3ca4d52f1f9092d9e061931f4184cd572885c23204"
             ],
             "version": "==1.0.3"
         },
@@ -57,43 +70,43 @@
         },
         "idna": {
             "hashes": [
-                "sha256:2c6a5de3089009e3da7c5dde64a141dbc8551d5b7f6cf4ed7c2568d0cc520a8f",
-                "sha256:8c7309c718f94b3a625cb648ace320157ad16ff131ae0af362c9f21b80ef6ec4"
+                "sha256:8c7309c718f94b3a625cb648ace320157ad16ff131ae0af362c9f21b80ef6ec4",
+                "sha256:2c6a5de3089009e3da7c5dde64a141dbc8551d5b7f6cf4ed7c2568d0cc520a8f"
             ],
             "version": "==2.6"
         },
         "lxml": {
             "hashes": [
-                "sha256:0ee07da52d240f1dc3c83eef5cd5f1b7f018226c1121f2a54d446645779a6d17",
-                "sha256:155521c337acecf8202091cff85bb9f709f238130ebadf04280fb1db11f5ad8b",
-                "sha256:155c916cf2645b4a8f2bd5d09065e92d1b67b8d464bdc001e0b524af84bedf6f",
-                "sha256:2190266059fec3c5a55f9d6c30532c64c6d414d3228909c0af573fe4907e78d1",
-                "sha256:29a36e354c39b2e24bc4ee103de53417ebb80f976a6ab9e8d093d559e2ac03e1",
-                "sha256:2dedfeeecc2d5a939cf622602f5a1ce443ca82407f386880f739f1a9f08053ad",
-                "sha256:3b33549fb8f91b38a7500078242b03cca513f3412a2cdae722e89bf83f95971d",
-                "sha256:4187c4b0cefc3353181db048c51f42c489d9ac51e40b86c4851dc0671372971d",
-                "sha256:41f59cbdab232f11680d5d4dec9f2e6782fd24d78e37ee833447702e34e675f4",
-                "sha256:470d7ce41e8047208ba1a376560bad17f1468df1f3097bc83902b26cfafdbb0c",
-                "sha256:49a655956f8de69e1258bc0fcfc43eb3bd1e038655784d77d1869b4b81444e37",
-                "sha256:4c12e90886d9c53ab434c8d0cebea122321cce19614c3c6b6d1a7700d7cc6212",
-                "sha256:6cba398eb37e0631e60e0e080c101cfe91769b2c8267105b64b4625e2581ea21",
-                "sha256:79322000279cda10b53c374d53ca632ead3bc51c6aebf8e62c8fa93a4d08b750",
-                "sha256:87a66bcadac270fc010cb029022a93fc722bf1204a8b03e782d4c790f0edf7ca",
-                "sha256:940caef1ec7c78e0c34b0f6b94fe42d0f2022915ffc78643d28538a5cfd0f40e",
-                "sha256:950e63387514aa1b881eba5ac6cb2ec51a118b3dafe99dd80ca19d8fb0142f30",
-                "sha256:af8a5373241d09b8fc53e0490e1719ce5dc90a21b19db89b6596c1adcdd52270",
-                "sha256:b106d4d2383382399ad82108fd187e92f40b1c90f55c2d36bbcb1c44bcf940fc",
-                "sha256:ba05732e4bcf59e948f61588851dcf620fd60d5bbd9d704203e5f59bbaa60219",
-                "sha256:d2c985d2460b81c6ca5feb8b86f1bc594ad59405d0bdf68626b85852b701553c",
-                "sha256:d5d29663e979e83b3fc361e97200f959cddb3a14797391d15273d84a5a8ae44b",
-                "sha256:dd291debfaa535d9cb6cee8d7aca2328775e037d02d13f1634e57f49bc302cc4",
-                "sha256:e37427d5a27eefbcfc48847e0b37f348113fac7280bc857421db39ffc6372570",
-                "sha256:e608839a5ee2180164424ccf279c8e2d9bbe8816d002c58fd97d6b621ba4aa94",
-                "sha256:e6b6698415c7e8d227a47a3b1038e1b37c2b438a1b48c2db7ad9e74ddbcd1149",
-                "sha256:e7e41d383f19bab9d57f5f3b18d158655bcd682e7e723f441b9e183e1e35a6b5",
-                "sha256:fa7320679ced5e25b20203d157280680fc84eb783b6cc650cb0c98e1858b7dd3"
-            ],
-            "version": "==4.1.1"
+                "sha256:0af9c9267b1257319d49e9c1e9abbf92a99f965bee3c4733e0f0f7578985182d",
+                "sha256:62bfcd0629991e1c1257ffd28df2ab31a5c44da4c06823c26ec0f472723a84ca",
+                "sha256:1d1e45584353e4d563685874707fc8c85cdd11b0ef3b79d77bb38046134d68a9",
+                "sha256:29697224b2df76edf7c2de9bcd90a26dd28fe85c5fd7f0171cae84f8383b227e",
+                "sha256:988d55112f196e12341b7c5138841c2b4f21f871eaa8f138c6ac4c46f28899f9",
+                "sha256:57be98177ce784495dff53f40620995ad0a56456246ed9d51977e595de58e12e",
+                "sha256:36ffb216e2f361a5a0a7e219aea6cd44da11c64061baed273944aae21223186c",
+                "sha256:d0dc3e5737adcc9a23fd3d3d3072b887fefb48143309563f412ef7b0ebdfdb30",
+                "sha256:7769ac9203ebe6d8db16904c54d57d77360fcc1926ed7afaa86b04050e4afa5b",
+                "sha256:4c21d7304d37715e6aed756e4d0c374c99c9bb1fa8d64f546b95474b17ac23de",
+                "sha256:0aa44ffdeaaf6ba45d61980bb2c07e87d4dcac7a8b5b9d458124bc1adcda5233",
+                "sha256:71ac6dac6835de75aaf531cae9ffa447dae0783ba1f43bf6eaccfad3680a5b9c",
+                "sha256:88583c6565c9299f617238a500f1a47510bac54daff7872d6a343f13361b659e",
+                "sha256:2812bc45a7f53f366217b76a1c53e6728fbfa7f7524d16a321ea8f7131428bd1",
+                "sha256:124a9d529eec5e10f307eb237df3efc43dd1fb7ebdb5da5e480c4ed372648b6b",
+                "sha256:f04b184984c23e0caac3c55eac2fe2dbb88726a5a1b35e23715eff6f29a4705c",
+                "sha256:d06260e6102b2f18dbee3736185cd6a2e1c88c0fad782bf8e9d7a7a1b24e02b0",
+                "sha256:0cddc6cde79e1932efc71d9974a4418184ad0b8ca46c633ad772b2c5eaf36b3c",
+                "sha256:9e08918b744b89d30750eca8598f37ae75b16202870db678fde970d85afed3e3",
+                "sha256:b46f31e806f6884bd1053ad1d78ecaca6d1bc5dd94a1b783a6ff0bb4b3a60962",
+                "sha256:dd98d4f88ce0abda2b02c1542d1de22dd342023f3ba09874bd95841283f29433",
+                "sha256:8f52c4c8f1cf15419193026e731f34a3260a3ce7977b875ba1eb2517b8a3f660",
+                "sha256:c18f316cad969111b1ff9e84c82fbc9ae6f25f35701118182d384585940cdf80",
+                "sha256:95b82fdfdaac71640b281da6b9a2c3700177ba5190a786881b184de744ad55de",
+                "sha256:cef79715f2335bfc1ef7082bcb8b2bac87271431653455221a9127fde146208c",
+                "sha256:4626d699551f66687e5f7e7f9b79bfce611e12edebfb9fec276e2df8ec46541e",
+                "sha256:cf63f590090404c52f179b7ceacb7cd549de3a1697bcfe2f79be180b2801d109",
+                "sha256:7d96fbb5f23a62300aa9bef7d286cd61aca8902357619c8708c0290aba5df73f"
+            ],
+            "version": "==4.2.0"
         },
         "parse": {
             "hashes": [
@@ -110,9 +123,9 @@
         },
         "pyppeteer": {
             "hashes": [
-                "sha256:64a2b894de3031dacb9a604c8ffd5e69bb397e3134b2c94fdc0a68ead4e485aa"
+                "sha256:4e0409fb30bb717296432d5548f6a3407d78d9efcf7a17f308fdb42d43607d9f"
             ],
-            "version": "==0.0.13"
+            "version": "==0.0.14"
         },
         "pyquery": {
             "hashes": [
@@ -130,8 +143,8 @@
         },
         "six": {
             "hashes": [
-                "sha256:70e8a77beed4562e7f14fe23a786b54f6296e34344c23bc42f07b15018ff98e9",
-                "sha256:832dc0e10feb1aa2c68dcc57dbb658f1c7e65b9b61af69048abc87a2db00a0eb"
+                "sha256:832dc0e10feb1aa2c68dcc57dbb658f1c7e65b9b61af69048abc87a2db00a0eb",
+                "sha256:70e8a77beed4562e7f14fe23a786b54f6296e34344c23bc42f07b15018ff98e9"
             ],
             "version": "==1.11.0"
         },
@@ -144,29 +157,29 @@
         },
         "w3lib": {
             "hashes": [
-                "sha256:55994787e93b411c2d659068b51b9998d9d0c05e0df188e6daf8f45836e1ea38",
-                "sha256:aaf7362464532b1036ab0092e2eee78e8fd7b56787baa9ed4967457b083d011b"
+                "sha256:aaf7362464532b1036ab0092e2eee78e8fd7b56787baa9ed4967457b083d011b",
+                "sha256:55994787e93b411c2d659068b51b9998d9d0c05e0df188e6daf8f45836e1ea38"
             ],
             "version": "==1.19.0"
         },
         "websockets": {
             "hashes": [
+                "sha256:f5192da704535a7cbf76d6e99c1ec4af7e8d1288252bf5a2385d414509ded0cf",
                 "sha256:0c31bc832d529dc7583d324eb6c836a4f362032a1902723c112cf57883488d8c",
-                "sha256:1f3e5a52cab6daa3d432c7b0de0a14109be39d2bfaad033ee5de4a3d3e11dcdf",
-                "sha256:341824d8c9ad53fc43cca3fa9407f294125fa258592f7676640396501448e57e",
-                "sha256:367ff945bc0950ad9634591e2afe50bf2222bc4fad1088a386c4bb700888026e",
-                "sha256:3859ca16c229ddb0fa21c5090e4efcb037c08ce69b0c1dfed6122c3f98cd0c22",
-                "sha256:3d425ae081fb4ba1eef9ecf30472ffd79f8e868297ccc7a47993c96dbf2a819c",
-                "sha256:64896a6b3368c959b8096b655e46f03dfa65b96745249f374bd6a35705cc3489",
-                "sha256:6df87698022aef2596bffdfecc96d656db59c8d719708c8a471daa815ee61656",
-                "sha256:80188abdadd23edaaea05ce761dc9a2e1df31a74a0533967f0dcd9560c85add0",
-                "sha256:d1a0572b6edb22c9208e3e5381064e09d287d2a915f90233fef994ee7a14a935",
-                "sha256:da4d4fbe059b0453e726d6d993760065d69b823a27efc3040402a6fcfe6a1ed9",
                 "sha256:da7610a017f5343fdf765f4e0eb6fd0dfd08264ca1565212b110836d9367fc9c",
-                "sha256:ebdd4f18fe7e3bea9bd3bf446b0f4117739478caa2c76e4f0fb72cc45b03cbd7",
-                "sha256:f5192da704535a7cbf76d6e99c1ec4af7e8d1288252bf5a2385d414509ded0cf",
                 "sha256:fd81af8cf3e69f9a97f3a6c0623a0527de0f922c2df725f00cd7646d478af632",
-                "sha256:fecf51c13195c416c22422353b306dddb9c752e4b80b21e0fa1fccbe38246677"
+                "sha256:3d425ae081fb4ba1eef9ecf30472ffd79f8e868297ccc7a47993c96dbf2a819c",
+                "sha256:ebdd4f18fe7e3bea9bd3bf446b0f4117739478caa2c76e4f0fb72cc45b03cbd7",
+                "sha256:3859ca16c229ddb0fa21c5090e4efcb037c08ce69b0c1dfed6122c3f98cd0c22",
+                "sha256:d1a0572b6edb22c9208e3e5381064e09d287d2a915f90233fef994ee7a14a935",
+                "sha256:80188abdadd23edaaea05ce761dc9a2e1df31a74a0533967f0dcd9560c85add0",
+                "sha256:fecf51c13195c416c22422353b306dddb9c752e4b80b21e0fa1fccbe38246677",
+                "sha256:367ff945bc0950ad9634591e2afe50bf2222bc4fad1088a386c4bb700888026e",
+                "sha256:6df87698022aef2596bffdfecc96d656db59c8d719708c8a471daa815ee61656",
+                "sha256:341824d8c9ad53fc43cca3fa9407f294125fa258592f7676640396501448e57e",
+                "sha256:64896a6b3368c959b8096b655e46f03dfa65b96745249f374bd6a35705cc3489",
+                "sha256:1f3e5a52cab6daa3d432c7b0de0a14109be39d2bfaad033ee5de4a3d3e11dcdf",
+                "sha256:da4d4fbe059b0453e726d6d993760065d69b823a27efc3040402a6fcfe6a1ed9"
             ],
             "version": "==4.0.1"
         }
@@ -179,32 +192,24 @@
             ],
             "version": "==0.7.10"
         },
-        "async-generator": {
-            "hashes": [
-                "sha256:2f45541002a14f80fffc6d52788f92470ff0d9bfe81c434ea8cd60babe43de9e",
-                "sha256:b7d5465c6174fe86dba498ececb175f93a6097ffb7cc91946405e1f05b848371"
-            ],
-            "markers": "python_version == '3.5'",
-            "version": "==1.9"
-        },
         "attrs": {
             "hashes": [
-                "sha256:1c7960ccfd6a005cd9f7ba884e6316b5e430a3f1a6c37c5f87d8b43f83b54ec9",
-                "sha256:a17a9573a6f475c99b551c0e0a812707ddda1ec9653bed04c13841404ed6f450"
+                "sha256:a17a9573a6f475c99b551c0e0a812707ddda1ec9653bed04c13841404ed6f450",
+                "sha256:1c7960ccfd6a005cd9f7ba884e6316b5e430a3f1a6c37c5f87d8b43f83b54ec9"
             ],
             "version": "==17.4.0"
         },
         "babel": {
             "hashes": [
-                "sha256:8ce4cb6fdd4393edd323227cba3a077bceb2a6ce5201c902c65e730046f41f14",
-                "sha256:ad209a68d7162c4cff4b29cdebe3dec4cef75492df501b0049a9433c96ce6f80"
+                "sha256:ad209a68d7162c4cff4b29cdebe3dec4cef75492df501b0049a9433c96ce6f80",
+                "sha256:8ce4cb6fdd4393edd323227cba3a077bceb2a6ce5201c902c65e730046f41f14"
             ],
             "version": "==2.5.3"
         },
         "beautifulsoup4": {
             "hashes": [
-                "sha256:11a9a27b7d3bddc6d86f59fb76afb70e921a25ac2d6cc55b40d072bd68435a76",
                 "sha256:7015e76bf32f1f574636c4288399a6de66ce08fb7b2457f628a8d70c0fbabb11",
+                "sha256:11a9a27b7d3bddc6d86f59fb76afb70e921a25ac2d6cc55b40d072bd68435a76",
                 "sha256:808b6ac932dccb0a4126558f7dfdcf41710dd44a4ef497a0bb59a77f9f078e89"
             ],
             "version": "==4.6.0"
@@ -224,31 +229,23 @@
         },
         "chardet": {
             "hashes": [
-                "sha256:84ab92ed1c4d4f16916e05906b6b75a6c0fb5db821cc65e70cbd64a3e2a5eaae",
-                "sha256:fc323ffcaeaed0e0a02bf4d117757b98aed530d9ed4531e3e15460124c106691"
+                "sha256:fc323ffcaeaed0e0a02bf4d117757b98aed530d9ed4531e3e15460124c106691",
+                "sha256:84ab92ed1c4d4f16916e05906b6b75a6c0fb5db821cc65e70cbd64a3e2a5eaae"
             ],
             "version": "==3.0.4"
         },
-        "colorama": {
-            "hashes": [
-                "sha256:463f8483208e921368c9f306094eb6f725c6ca42b0f97e313cb5d5512459feda",
-                "sha256:48eb22f4f8461b1df5734a074b57042430fb06e1d61bd1e11b078c0fe6d7a1f1"
-            ],
-            "markers": "sys_platform == 'win32'",
-            "version": "==0.3.9"
-        },
         "cssselect": {
             "hashes": [
-                "sha256:066d8bc5229af09617e24b3ca4d52f1f9092d9e061931f4184cd572885c23204",
-                "sha256:3b5103e8789da9e936a68d993b70df732d06b8bb9a337a05ed4eb52c17ef7206"
+                "sha256:3b5103e8789da9e936a68d993b70df732d06b8bb9a337a05ed4eb52c17ef7206",
+                "sha256:066d8bc5229af09617e24b3ca4d52f1f9092d9e061931f4184cd572885c23204"
             ],
             "version": "==1.0.3"
         },
         "docutils": {
             "hashes": [
+                "sha256:7a4bd47eaf6596e1295ecb11361139febe29b084a87bf005bf899f9a42edc3c6",
                 "sha256:02aec4bd92ab067f6ff27a38a38a41173bf01bed8f89157768c1573f53e474a6",
-                "sha256:51e64ef2ebfb29cae1faa133b3710143496eca21c530f3f71424d77687764274",
-                "sha256:7a4bd47eaf6596e1295ecb11361139febe29b084a87bf005bf899f9a42edc3c6"
+                "sha256:51e64ef2ebfb29cae1faa133b3710143496eca21c530f3f71424d77687764274"
             ],
             "version": "==0.14"
         },
@@ -262,18 +259,10 @@
             ],
             "version": "==0.1.10"
         },
-        "funcsigs": {
-            "hashes": [
-                "sha256:330cc27ccbf7f1e992e69fef78261dc7c6569012cf397db8d3de0234e6c937ca",
-                "sha256:a7bb0f2cf3a3fd1ab2732cb49eba4252c2af4240442415b4abce3b87022a8f50"
-            ],
-            "markers": "python_version < '3.0'",
-            "version": "==1.0.2"
-        },
         "idna": {
             "hashes": [
-                "sha256:2c6a5de3089009e3da7c5dde64a141dbc8551d5b7f6cf4ed7c2568d0cc520a8f",
-                "sha256:8c7309c718f94b3a625cb648ace320157ad16ff131ae0af362c9f21b80ef6ec4"
+                "sha256:8c7309c718f94b3a625cb648ace320157ad16ff131ae0af362c9f21b80ef6ec4",
+                "sha256:2c6a5de3089009e3da7c5dde64a141dbc8551d5b7f6cf4ed7c2568d0cc520a8f"
             ],
             "version": "==2.6"
         },
@@ -293,36 +282,36 @@
         },
         "lxml": {
             "hashes": [
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-                "sha256:155521c337acecf8202091cff85bb9f709f238130ebadf04280fb1db11f5ad8b",
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-                "sha256:87a66bcadac270fc010cb029022a93fc722bf1204a8b03e782d4c790f0edf7ca",
-                "sha256:940caef1ec7c78e0c34b0f6b94fe42d0f2022915ffc78643d28538a5cfd0f40e",
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-                "sha256:af8a5373241d09b8fc53e0490e1719ce5dc90a21b19db89b6596c1adcdd52270",
-                "sha256:b106d4d2383382399ad82108fd187e92f40b1c90f55c2d36bbcb1c44bcf940fc",
-                "sha256:ba05732e4bcf59e948f61588851dcf620fd60d5bbd9d704203e5f59bbaa60219",
-                "sha256:d2c985d2460b81c6ca5feb8b86f1bc594ad59405d0bdf68626b85852b701553c",
-                "sha256:d5d29663e979e83b3fc361e97200f959cddb3a14797391d15273d84a5a8ae44b",
-                "sha256:dd291debfaa535d9cb6cee8d7aca2328775e037d02d13f1634e57f49bc302cc4",
-                "sha256:e37427d5a27eefbcfc48847e0b37f348113fac7280bc857421db39ffc6372570",
-                "sha256:e608839a5ee2180164424ccf279c8e2d9bbe8816d002c58fd97d6b621ba4aa94",
-                "sha256:e6b6698415c7e8d227a47a3b1038e1b37c2b438a1b48c2db7ad9e74ddbcd1149",
-                "sha256:e7e41d383f19bab9d57f5f3b18d158655bcd682e7e723f441b9e183e1e35a6b5",
-                "sha256:fa7320679ced5e25b20203d157280680fc84eb783b6cc650cb0c98e1858b7dd3"
-            ],
-            "version": "==4.1.1"
+                "sha256:0af9c9267b1257319d49e9c1e9abbf92a99f965bee3c4733e0f0f7578985182d",
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+                "sha256:1d1e45584353e4d563685874707fc8c85cdd11b0ef3b79d77bb38046134d68a9",
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+                "sha256:988d55112f196e12341b7c5138841c2b4f21f871eaa8f138c6ac4c46f28899f9",
+                "sha256:57be98177ce784495dff53f40620995ad0a56456246ed9d51977e595de58e12e",
+                "sha256:36ffb216e2f361a5a0a7e219aea6cd44da11c64061baed273944aae21223186c",
+                "sha256:d0dc3e5737adcc9a23fd3d3d3072b887fefb48143309563f412ef7b0ebdfdb30",
+                "sha256:7769ac9203ebe6d8db16904c54d57d77360fcc1926ed7afaa86b04050e4afa5b",
+                "sha256:4c21d7304d37715e6aed756e4d0c374c99c9bb1fa8d64f546b95474b17ac23de",
+                "sha256:0aa44ffdeaaf6ba45d61980bb2c07e87d4dcac7a8b5b9d458124bc1adcda5233",
+                "sha256:71ac6dac6835de75aaf531cae9ffa447dae0783ba1f43bf6eaccfad3680a5b9c",
+                "sha256:88583c6565c9299f617238a500f1a47510bac54daff7872d6a343f13361b659e",
+                "sha256:2812bc45a7f53f366217b76a1c53e6728fbfa7f7524d16a321ea8f7131428bd1",
+                "sha256:124a9d529eec5e10f307eb237df3efc43dd1fb7ebdb5da5e480c4ed372648b6b",
+                "sha256:f04b184984c23e0caac3c55eac2fe2dbb88726a5a1b35e23715eff6f29a4705c",
+                "sha256:d06260e6102b2f18dbee3736185cd6a2e1c88c0fad782bf8e9d7a7a1b24e02b0",
+                "sha256:0cddc6cde79e1932efc71d9974a4418184ad0b8ca46c633ad772b2c5eaf36b3c",
+                "sha256:9e08918b744b89d30750eca8598f37ae75b16202870db678fde970d85afed3e3",
+                "sha256:b46f31e806f6884bd1053ad1d78ecaca6d1bc5dd94a1b783a6ff0bb4b3a60962",
+                "sha256:dd98d4f88ce0abda2b02c1542d1de22dd342023f3ba09874bd95841283f29433",
+                "sha256:8f52c4c8f1cf15419193026e731f34a3260a3ce7977b875ba1eb2517b8a3f660",
+                "sha256:c18f316cad969111b1ff9e84c82fbc9ae6f25f35701118182d384585940cdf80",
+                "sha256:95b82fdfdaac71640b281da6b9a2c3700177ba5190a786881b184de744ad55de",
+                "sha256:cef79715f2335bfc1ef7082bcb8b2bac87271431653455221a9127fde146208c",
+                "sha256:4626d699551f66687e5f7e7f9b79bfce611e12edebfb9fec276e2df8ec46541e",
+                "sha256:cf63f590090404c52f179b7ceacb7cd549de3a1697bcfe2f79be180b2801d109",
+                "sha256:7d96fbb5f23a62300aa9bef7d286cd61aca8902357619c8708c0290aba5df73f"
+            ],
+            "version": "==4.2.0"
         },
         "markupsafe": {
             "hashes": [
@@ -332,8 +321,8 @@
         },
         "mypy": {
             "hashes": [
-                "sha256:83d798f66323f2de6191d66d9ae5ab234e4ee5b400010e19c58d75d308049f25",
-                "sha256:884f18f3a40cfcf24cdd5860b84958cfb35e6563e439c5adc1503878df221dc3"
+                "sha256:884f18f3a40cfcf24cdd5860b84958cfb35e6563e439c5adc1503878df221dc3",
+                "sha256:83d798f66323f2de6191d66d9ae5ab234e4ee5b400010e19c58d75d308049f25"
             ],
             "version": "==0.570"
         },
@@ -352,10 +341,10 @@
         },
         "pkginfo": {
             "hashes": [
-                "sha256:31a49103180ae1518b65d3f4ce09c784e2bc54e338197668b4fb7dc539521024",
-                "sha256:bb1a6aeabfc898f5df124e7e00303a5b3ec9a489535f346bfbddb081af93f89e"
+                "sha256:a39076cb3eb34c333a0dd390b568e9e1e881c7bf2cc0aee12120636816f55aee",
+                "sha256:5878d542a4b3f237e359926384f1dde4e099c9f5525d236b1840cf704fa8d474"
             ],
-            "version": "==1.4.1"
+            "version": "==1.4.2"
         },
         "pluggy": {
             "hashes": [
@@ -363,6 +352,20 @@
             ],
             "version": "==0.6.0"
         },
+        "psutil": {
+            "hashes": [
+                "sha256:82a06785db8eeb637b349006cc28a92e40cd190fefae9875246d18d0de7ccac8",
+                "sha256:4152ae231709e3e8b80e26b6da20dc965a1a589959c48af1ed024eca6473f60d",
+                "sha256:230eeb3aeb077814f3a2cd036ddb6e0f571960d327298cc914c02385c3e02a63",
+                "sha256:a3286556d4d2f341108db65d8e20d0cd3fcb9a91741cb5eb496832d7daf2a97c",
+                "sha256:94d4e63189f2593960e73acaaf96be235dd8a455fe2bcb37d8ad6f0e87f61556",
+                "sha256:c91eee73eea00df5e62c741b380b7e5b6fdd553891bee5669817a3a38d036f13",
+                "sha256:779ec7e7621758ca11a8d99a1064996454b3570154277cc21342a01148a49c28",
+                "sha256:8a15d773203a1277e57b1d11a7ccdf70804744ef4a9518a87ab8436995c31a4b",
+                "sha256:e2467e9312c2fa191687b89ff4bc2ad8843be4af6fb4dc95a7cc5f7d7a327b18"
+            ],
+            "version": "==5.4.3"
+        },
         "py": {
             "hashes": [
                 "sha256:8cca5c229d225f8c1e3085be4fcf306090b00850fefad892f9d96c7b6e2f310f",
@@ -386,16 +389,21 @@
         },
         "pyparsing": {
             "hashes": [
+                "sha256:fee43f17a9c4087e7ed1605bd6df994c6173c1e977d7ade7b651292fab2bd010",
                 "sha256:0832bcf47acd283788593e7a0f542407bd9550a55a8a8435214a1960e04bcb04",
-                "sha256:fee43f17a9c4087e7ed1605bd6df994c6173c1e977d7ade7b651292fab2bd010"
+                "sha256:9e8143a3e15c13713506886badd96ca4b579a87fbdf49e550dbfc057d6cb218e",
+                "sha256:281683241b25fe9b80ec9d66017485f6deff1af5cde372469134b56ca8447a07",
+                "sha256:b8b3117ed9bdf45e14dcc89345ce638ec7e0e29b2b579fa1ecf32ce45ebac8a5",
+                "sha256:8f1e18d3fd36c6795bb7e02a39fd05c611ffc2596c1e0d995d34d67630426c18",
+                "sha256:e4d45427c6e20a59bf4f88c639dcc03ce30d193112047f94012102f235853a58"
             ],
             "version": "==2.2.0"
         },
         "pyppeteer": {
             "hashes": [
-                "sha256:64a2b894de3031dacb9a604c8ffd5e69bb397e3134b2c94fdc0a68ead4e485aa"
+                "sha256:4e0409fb30bb717296432d5548f6a3407d78d9efcf7a17f308fdb42d43607d9f"
             ],
-            "version": "==0.0.13"
+            "version": "==0.0.14"
         },
         "pyquery": {
             "hashes": [
@@ -420,7 +428,14 @@
         },
         "pytz": {
             "hashes": [
+                "sha256:ed6509d9af298b7995d69a440e2822288f2eca1681b8cce37673dbb10091e5fe",
+                "sha256:f93ddcdd6342f94cea379c73cddb5724e0d6d0a1c91c9bdef364dc0368ba4fda",
+                "sha256:61242a9abc626379574a166dc0e96a66cd7c3b27fc10868003fa210be4bff1c9",
+                "sha256:ba18e6a243b3625513d85239b3e49055a2f0318466e0b8a92b8fb8ca7ccdf55f",
                 "sha256:07edfc3d4d2705a20a6e99d97f0c4b61c800b8232dc1c04d87e8554f130148dd",
+                "sha256:3a47ff71597f821cd84a162e71593004286e5be07a340fd462f0d33a760782b5",
+                "sha256:5bd55c744e6feaa4d599a6cbd8228b4f8f9ba96de2c38d56f08e534b3c9edf0d",
+                "sha256:887ab5e5b32e4d0c86efddd3d055c1f363cbaa583beb8da5e22d2fa2f64d51ef",
                 "sha256:410bcd1d6409026fbaa65d9ed33bf6dd8b1e94a499e32168acfc7b332e4095c0"
             ],
             "version": "==2018.3"
@@ -448,15 +463,15 @@
         },
         "six": {
             "hashes": [
-                "sha256:70e8a77beed4562e7f14fe23a786b54f6296e34344c23bc42f07b15018ff98e9",
-                "sha256:832dc0e10feb1aa2c68dcc57dbb658f1c7e65b9b61af69048abc87a2db00a0eb"
+                "sha256:832dc0e10feb1aa2c68dcc57dbb658f1c7e65b9b61af69048abc87a2db00a0eb",
+                "sha256:70e8a77beed4562e7f14fe23a786b54f6296e34344c23bc42f07b15018ff98e9"
             ],
             "version": "==1.11.0"
         },
         "snowballstemmer": {
             "hashes": [
-                "sha256:919f26a68b2c17a7634da993d91339e288964f93c274f1343e3bbbe2096e1128",
-                "sha256:9f3bcd3c401c3e862ec0ebe6d2c069ebc012ce142cce209c098ccb5b09136e89"
+                "sha256:9f3bcd3c401c3e862ec0ebe6d2c069ebc012ce142cce209c098ccb5b09136e89",
+                "sha256:919f26a68b2c17a7634da993d91339e288964f93c274f1343e3bbbe2096e1128"
             ],
             "version": "==1.2.1"
         },
@@ -469,57 +484,48 @@
         },
         "sphinxcontrib-websupport": {
             "hashes": [
-                "sha256:7a85961326aa3a400cd4ad3c816d70ed6f7c740acd7ce5d78cd0a67825072eb9",
-                "sha256:f4932e95869599b89bf4f80fc3989132d83c9faa5bf633e7b5e0c25dffb75da2"
+                "sha256:f4932e95869599b89bf4f80fc3989132d83c9faa5bf633e7b5e0c25dffb75da2",
+                "sha256:7a85961326aa3a400cd4ad3c816d70ed6f7c740acd7ce5d78cd0a67825072eb9"
             ],
             "version": "==1.0.1"
         },
         "tqdm": {
             "hashes": [
-                "sha256:5ec0d4442358e55cdb4a0471d04c6c831518fd8837f259db5537d90feab380df",
-                "sha256:f66468c14ccd011a627734c9b3fd72f20ce16f8faecc47384eb2507af5924fb9"
+                "sha256:05e991ecb0f874046ddcb374396a626afd046fb4d31f73633ea752b844458a7a",
+                "sha256:2aea9f81fdf127048667e0ba22f5fc10ebc879fb838dc52dcf055242037ec1f7"
             ],
-            "version": "==4.19.6"
+            "version": "==4.19.8"
         },
         "twine": {
             "hashes": [
-                "sha256:c3540f2b98667698412b0dc9f5e40c8c1a08a9e79e255c9c21339105eb4ca57a",
-                "sha256:eff86e20fdffef8abb0b638784c62d0348dac4c80380907e39b732c56e9192fb"
+                "sha256:08eb132bbaec40c6d25b358f546ec1dc96ebd2638a86eea68769d9e67fe2b129",
+                "sha256:2fd9a4d9ff0bcacf41fdc40c8cb0cfaef1f1859457c9653fd1b92237cc4e9f25"
             ],
-            "version": "==1.10.0"
+            "version": "==1.11.0"
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         "typed-ast": {
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                 "sha256:25d8feefe27eb0303b73545416b13d108c6067b846b543738a25ff304824ed9a",
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-                "sha256:3e0d5e48e3a23e9a4d1a9f698e32a542a4a288c871d33ed8df1b092a40f3a0f9",
+                "sha256:c05b41bc1deade9f90ddc5d988fe506208019ebba9f2578c622516fd201f5863",
                 "sha256:519425deca5c2b2bdac49f77b2c5625781abbaf9a809d727d3a5596b30bb4ded",
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                 "sha256:6de012d2b166fe7a4cdf505eee3aaa12192f7ba365beeefaca4ec10e31241a85",
                 "sha256:79b91ebe5a28d349b6d0d323023350133e927b4de5b651a8aa2db69c761420c6",
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                 "sha256:a8034021801bc0440f2e027c354b4eafd95891b573e12ff0418dec385c76785c",
-                "sha256:bc978ac17468fe868ee589c795d06777f75496b1ed576d308002c8a5756fb9ea",
-                "sha256:c05b41bc1deade9f90ddc5d988fe506208019ebba9f2578c622516fd201f5863",
+                "sha256:f19f2a4f547505fe9072e15f6f4ae714af51b5a681a97f187971f50c283193b6",
                 "sha256:c9b060bd1e5a26ab6e8267fd46fc9e02b54eb15fffb16d112d4c7b1c12987559",
+                "sha256:2e214b72168ea0275efd6c884b114ab42e316de3ffa125b267e732ed2abda892",
+                "sha256:bc978ac17468fe868ee589c795d06777f75496b1ed576d308002c8a5756fb9ea",
                 "sha256:edb04bdd45bfd76c8292c4d9654568efaedf76fe78eb246dde69bdb13b2dad87",
-                "sha256:f19f2a4f547505fe9072e15f6f4ae714af51b5a681a97f187971f50c283193b6"
+                "sha256:668d0cec391d9aed1c6a388b0d5b97cd22e6073eaa5fbaa6d2946603b4871efe",
+                "sha256:29464a177d56e4e055b5f7b629935af7f49c196be47528cc94e0a7bf83fbc2b9",
+                "sha256:8550177fa5d4c1f09b5e5f524411c44633c80ec69b24e0e98906dd761941ca46",
+                "sha256:3e0d5e48e3a23e9a4d1a9f698e32a542a4a288c871d33ed8df1b092a40f3a0f9",
+                "sha256:68ba70684990f59497680ff90d18e756a47bf4863c604098f10de9716b2c0bdd",
+                "sha256:57fe287f0cdd9ceaf69e7b71a2e94a24b5d268b35df251a88fef5cc241bf73aa"
             ],
             "version": "==1.1.0"
         },
-        "typing": {
-            "hashes": [
-                "sha256:3a887b021a77b292e151afb75323dea88a7bc1b3dfa92176cff8e44c8b68bddf",
-                "sha256:b2c689d54e1144bbcfd191b0832980a21c2dbcf7b5ff7a66248a60c90e951eb8",
-                "sha256:d400a9344254803a2368533e4533a4200d21eb7b6b729c173bc38201a74db3f2"
-            ],
-            "markers": "python_version < '3.5'",
-            "version": "==3.6.4"
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         "urllib3": {
             "hashes": [
                 "sha256:06330f386d6e4b195fbfc736b297f58c5a892e4440e54d294d7004e3a9bbea1b",
@@ -529,29 +535,29 @@
         },
         "w3lib": {
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