message: Also lint in-repo addon styesheets
diff: "scripts": {
  "build": "ember build",
  "start": "ember server",
  - "lint": "eslint --ext js,ts --max-warnings=0 --ignore-pattern=!.eslintrc.js . && tslint -p . && stylelint 'app/**/*.scss'",
  + "lint": "eslint --ext js,ts --max-warnings=0 --ignore-pattern=!.eslintrc.js . && tslint -p . && stylelint 'app/**/*.scss' 'lib/**/*.scss'",
  "test": "ember test",
  "test:cover": "COVERAGE=true ember test",
  "test:config": "mocha node-tests/config-test.js",
  