message: build: create a report folder if it does not exist during lint command
diff: "test": "ng test --code-coverage --watch=false",
  "test:watch": "ng test",
  "lint": "ng lint",
  - "lint:report": "ng lint -t checkstyle > reports/checkstyle-result.xml",
  + "lint:report": "mkdir -p reports; ng lint -t checkstyle > reports/checkstyle-result.xml",
  "e2e": "ng e2e",
  "changelog": "conventional-changelog -p angular -i CHANGELOG.md -s"
  },
  