Update deps for the client package

Fixes probot#110

client/package.json

@@ -20,20 +20,21 @@
   },
   "homepage": "https://github.com/probot/smee#readme",
   "dependencies": {
-    "commander": "^2.12.2",
-    "eventsource": "^1.0.5",
-    "morgan": "^1.9.0",
-    "superagent": "^3.8.3",
-    "validator": "^10.4.0"
+    "commander": "^2.19.0",
+    "eventsource": "^1.0.7",
+    "morgan": "^1.9.1",
+    "superagent": "^5.0.2",
+    "validator": "^10.11.0"
   },
   "devDependencies": {
-    "@babel/core": "^7.2.2",
+    "@babel/core": "^7.4.0",
     "babel-core": "^7.0.0-bridge.0",
-    "babel-jest": "^23.6.0",
-    "jest": "^23.1.0",
-    "nock": "^9.3.3",
+    "babel-jest": "^24.5.0",
+    "connect-sse": "^1.2.0",
+    "jest": "^24.5.0",
+    "nock": "^10.0.6",
     "standard": "^12.0.1",
-    "supertest": "^3.1.0"
+    "supertest": "^4.0.2"
   },
   "standard": {
     "env": [