message: add fix-format task to package.json
diff: "start": "webpack --config webpack.config.js --mode production",
  "dev": "webpack-dev-server --mode development",
  "test": "karma start --single-run",
  + "fix-format": "node_modules/typescript-formatter/bin/tsfmt -r",
  "checking-format": "node_modules/typescript-formatter/bin/tsfmt --verify",
  "checking-typescript": "node_modules/typescript/bin/tsc --noEmit"
  },
  