message: docs(changelog): generate and add to git changelog file
diff: "test": "npm run test:transformer && npm run test:framework",
  "test:transformer": "karma start config/karma/karma.config.transformer.js",
  "test:framework": "karma start config/karma/karma.config.framework.js",
  - "version": "conventional-changelog -p angular -i CHANGELOG.md -s",
  + "version": "conventional-changelog -p angular -i CHANGELOG.md -s && git add CHANGELOG.md",
  "prepublishOnly": "npm run build && npm run copyForPublish",
  "copyForPublish": "cp -rf package.json README.md CHANGELOG.md dist"
  },
  