refactor(package): Remove Babel flow

BREAKING CHANGE: Removed support for older NodeJS versions

Author: ghaiklor

.babelrc

@@ -29,9 +29,6 @@ build/Release
 # Dependency directory
 node_modules
 
-# Babel compiled sources
-lib
-
 # Miscellaneous
 *~
 *#

.gitignore

@@ -16,18 +16,13 @@ notifications:
   email: true
 node_js:
   - stable
-  - 5
-  - 4
 before_install:
   - npm install -g npm@latest
 before_script:
   - npm prune
 after_success:
-  - 'curl -Lo travis_after_all.py https://git.io/travis_after_all'
-  - python travis_after_all.py
-  - 'export $(cat .to_export_back) &> /dev/null'
   - npm run coveralls
   - npm run semantic-release
 branches:
   except:
-    - "/^v\\d+\\.\\d+\\.\\d+$/"
+    - /^v\d+\.\d+\.\d+$/