message: npm run coverage
diff: "build-version": "./timestamp.sh > src/versionInfo.ts && eslint 'src/versionInfo.ts' --fix",
  "watch": "npm run build-version && babel src --out-dir lib --watch --source-maps --extensions '.ts,.js'",
  "clean": "rm -rf lib",
  + "coverage": "jest --coverage --collectCoverageFrom=src/**/*.[jt]s",
  "lint": "eslint 'src/**/*.js' 'src/**/*.ts'",
  "lint-fix": "eslint 'src/**/*.js' 'src/**/*.ts' --fix",
  "jest": "jest",
  