message: chore: add script to package.json to generate constants
diff: "clean:dist": "rimraf dist",
  "clean": "yarn clean:build && yarn clean:dist",
  "docs": "yarn build:dist && yarn ae && api-documenter markdown -i build/api-extractor -o docs",
  + "gen:constants": "node scripts/build-constants.js",
  "lint": "tslint -p . -c tslint.json",
  "lint:files": "tslint -c tslint.json",
  "pregyp": "node-pre-gyp",
  