message: added watch tasks to npm scripts
diff: "build_prod": "npm run build_dev && concurrently \"npm run build_knockout_prod\" \"npm run build_react_prod\" \"npm run build_angular_prod\" \"npm run build_jquery_prod\" \"npm run build_vue_prod\"",
  "doc_gen": "set TS_NODE_COMPILER_OPTIONS={\"module\":\"commonjs\"} && ts-node doc_generator/lib_docgenerator.ts src/entries/chunks/model.ts",
  "doc_update": "set TS_NODE_COMPILER_OPTIONS={\"module\":\"commonjs\"} && ts-node doc_generator/lib_docupdater.ts",
  - "lint": "tslint ./src/**/*.ts -t verbose"
  + "lint": "tslint ./src/**/*.ts -t verbose",
  + "watch_knockout_dev": "webpack --env.buildType dev --env.platform knockout --watch",
  + "watch_react_dev": "webpack --env.buildType dev --env.platform react --watch",
  + "watch_angular_dev": "webpack --env.buildType dev --env.platform angular --watch",
  + "watch_jquery_dev": "webpack --env.buildType dev --env.platform jquery --watch",
  + "watch_vue_dev": "webpack --env.buildType dev --env.platform vue --watch"
  },
  "version": "1.0.27",
  "name": "surveyjs",
  