Merge pull request #4071 from QuantiModo/feature/getVariableCategory

nvm install 10

Author: mikepsinn

.travis.yml

@@ -46,7 +46,7 @@ before_install:
   - bundle install
   - bundle update
   - export LANG=en_US.UTF-8
-  - nvm install 8
+  - nvm install 10
   - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then brew update ; brew install yarn ios-sim
     ios-deploy imagemagick; fi
   - npm install -g cordova ionic gulp bower cordova-hot-code-push-cli cordova-res