Add automatic linting

.travis.yml

@@ -28,6 +28,7 @@ install:
 
 script:
   - yarn run build
+  - yarn lint
   - yarn test
   - export TRAVIS_BUILD_NUMBER="" # Override travis build number since it is uses for tagging the binary version https://github.com/electron-userland/electron-builder/issues/3730
   - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then docker run -e GH_TOKEN=$GH_TOKEN -e GIT_TAG=$TRAVIS_TAG --rm -v `pwd`:/app thomasnordquist/ui-test-recording-env sh -c "cd app && docker/testMounted.sh"; fi

appveyor.yml

@@ -16,6 +16,7 @@ build_script:
   - yarn package appx
 
 test_script:
+  - yarn lint
   - yarn test
 
 artifacts: