docs(test): Dont test all node versions

Author: trevorgerhardt

.travis.yml

@@ -6,20 +6,12 @@ cache:
 notifications:
   email: false
 node_js:
-  - '4'
-  - iojs-v3
-  - iojs-v2
-  - iojs-v1
-  - '0.12'
-  - '0.10'
+  - '6'
 before_install:
-  - npm i -g npm@^2.0.0
+  - npm i -g npm@^3.0.0
 before_script:
   - npm prune
 after_success:
-  - 'curl -Lo travis_after_all.py https://git.io/travis_after_all'
-  - python travis_after_all.py
-  - export $(cat .to_export_back) &> /dev/null
   - npm run semantic-release
 branches:
   except: