message: adds script to publish to npm
diff: "build": "npm run clean && tsc && tsc -m es6 --outDir dist/lib-esm && webpack",
  "lint": "eslint 'src/**/*.ts'",
  "lint:fix": "eslint --fix 'src/**/*.ts'",
  - "test": "jest"
  + "test": "jest",
  + "preversion": "npm test",
  + "version": "npm run build && git add -A dist",
  + "postversion": "git push && git push --tags && rm -rf build/temp"
  },
  "author": "Ricardo Ambrogi",
  "license": "MIT",
  