message: Migrate JavaScript code to Standard 12.x code style rules
diff: "sinon": "~6.0",
  "sinon-chai": "~3.2",
  "socket.io-client": "~2.1",
  - "standard": "~11",
  + "standard": "~12",
  "stryker": "~0.29",
  "stryker-api": "~0.21",
  "stryker-html-reporter": "~0.16",
  