reduce browser & env combinations to test

.travis.yml

@@ -1,7 +1,5 @@
 language: node_js
 node_js:
-  - 6
-  - 5
   - 4
 addons:
   sauce_connect: true

test/config/.launchers.yml

@@ -10,14 +10,6 @@ Chrome_49:
   base: SauceLabs
   browserName: Chrome
   version: '49'
-Chrome_48:
-  base: SauceLabs
-  browserName: Chrome
-  version: '48'
-Chrome_47:
-  base: SauceLabs
-  browserName: Chrome
-  version: '47'
 
 
 Firefox_46:
@@ -32,14 +24,6 @@ Firefox_44:
   base: SauceLabs
   browserName: Firefox
   version: '44'
-Firefox_43:
-  base: SauceLabs
-  browserName: Firefox
-  version: '43'
-Firefox_42:
-  base: SauceLabs
-  browserName: Firefox
-  version: '42'
 
 
 Edge:
@@ -91,42 +75,14 @@ Safari_6:
   version: '6'
 
 
-iOS_9_2:
-  base: SauceLabs
-  browserName: iPhone
-  version: '9.2'
-iOS_9_1:
-  base: SauceLabs
-  browserName: iPhone
-  version: '9.1'
 iOS_9_0:
   base: SauceLabs
   browserName: iPhone
   version: '9.0'
-iOS_8_4:
-  base: SauceLabs
-  browserName: iPhone
-  version: '8.4'
-iOS_8_3:
-  base: SauceLabs
-  browserName: iPhone
-  version: '8.3'
-iOS_8_2:
-  base: SauceLabs
-  browserName: iPhone
-  version: '8.2'
-iOS_8_1:
-  base: SauceLabs
-  browserName: iPhone
-  version: '8.1'
 iOS_8_0:
   base: SauceLabs
   browserName: iPhone
   version: '8.0'
-iOS_7_1:
-  base: SauceLabs
-  browserName: iPhone
-  version: '7.1'
 iOS_7_0:
   base: SauceLabs
   browserName: iPhone
@@ -145,15 +101,3 @@ Android_4_3:
   base: SauceLabs
   browserName: Android
   version: '4.3'
-Android_4_2:
-  base: SauceLabs
-  browserName: Android
-  version: '4.2'
-Android_4_1:
-  base: SauceLabs
-  browserName: Android
-  version: '4.1'
-Android_4_0:
-  base: SauceLabs
-  browserName: Android
-  version: '4.0'