message: chore(CI): no longer cleaning library files before build
  Transpiled files are no longer being generated in the lib dir
diff: "npm": ">= 3.0.0"
  },
  "scripts": {
  - "clean:lib": "rimraf out-tsc dist \"src/lib/**/*.js\" \"src/lib/**/*.map\" \"src/lib/helpers.scss\"",
  + "clean:lib": "rimraf out-tsc dist \"src/lib/**/!(systemjs-angular-loader).js\" \"src/lib/**/*.map\" \"src/lib/helpers.scss\"",
  "clean:demo": "rimraf \"src/demo/**/*.js\" \"src/demo/**/*.map\"",
  "clean:styleguide": "rm -rf styleguide",
  "commitmsg": "validate-commit-msg",
  "docs:scss": "node ./node_modules/.bin/nucleus --config config.nucleus.json",
  "docs:ts": "./node_modules/.bin/compodoc -p src/lib/tsconfig.compodoc.json -d docs --hideGenerator --toggleMenuItems all --theme stripe",
  "docs:toc": "doctoc --title '**Table of Contents**' --maxlevel 4 ./README.md",
  - "prebuild": "npm run clean:lib",
  "build": "node tooling/build.js",
  "build:watch": "onchange 'src/lib/**/*.ts' -- npm run build",
  "build-demo": "cd src/demo && ng build --prod",
  