add node v7 test

.travis.yml

@@ -2,6 +2,7 @@ language: node_js
 
 node_js:
   - "6"
+  - "7"
 
 os:
   - linux
@@ -23,7 +24,7 @@ before_install:
   - "npm config set progress=false"
 
 install:
-  - if [ "$TRAVIS_OS_NAME" == 'osx' ]; then brew update; brew cleanup; brew cask cleanup; fi 
+  - if [ "$TRAVIS_OS_NAME" == 'osx' ]; then brew update; brew cleanup; brew cask cleanup; fi
   - if [ "$TRAVIS_OS_NAME" == 'osx' ]; then brew uninstall --force brew-cask; brew update; fi
   - if [ "$TRAVIS_OS_NAME" == 'osx' ]; then brew cask install --force google-chrome; fi
 

appveyor.yml

@@ -3,8 +3,9 @@
 # Test against these versions of Io.js and Node.js.
 environment:
   matrix:
-  # node.js
     - nodejs_version: "6"
+    - nodejs_version: "7"
+
 
 # Install scripts. (runs after repo cloning)
 install:

circle.yml

 machine:
   node:
     version: 6
-    
+
 dependencies:
   pre:
     - google-chrome --version
@@ -9,4 +9,9 @@ dependencies:
     - sudo sh -c 'echo "deb http://dl.google.com/linux/chrome/deb/ stable main" >> /etc/apt/sources.list.d/google.list'
     - sudo apt-get update
     - sudo apt-get --only-upgrade install google-chrome-stable
-    - google-chrome --version
\ No newline at end of file
+    - google-chrome --version
+
+test:
+  override:
+    - nvm use 6; npm test
+    - nvm use 7; npm test