chore(travis): simplified travis setup

Author: gr2m

.travis.yml

@@ -6,22 +6,13 @@ cache:
 notifications:
   email: false
 node_js:
-  - '0.10'
+  - 4
 script: npm run $COMMAND
-before_install:
-  - npm i -g npm@^2.0.0
 before_script:
   - npm prune
-  - 'curl -Lo travis_after_all.py https://git.io/vLSON'
 after_success:
-  - python travis_after_all.py
-  - export $(cat .to_export_back)
-  - if [[ $COMMAND = test:coverage ]]; then npm run test:coverage:upload; fi
+  - npm run test:coverage && npm run test:coverage:upload
   - npm run semantic-release
-env:
-  matrix:
-    - NODE=0.10 COMMAND=test:coverage
-    - NODE=0.10 COMMAND=test
-    - NODE=0.12 COMMAND=test
-    - NODE=iojs-v1 COMMAND=test
-    - NODE=iojs-v2 COMMAND=test
+branches:
+  except:
+    - /^v\d+\.\d+\.\d+$/