message: Upgrade to mocha 5.05
  primarily for use of `describe.only`
diff: "karma-summary-reporter": "^1.3.3",
  "karma-webpack": "^1.7.0",
  "matrix-react-test-utils": "^0.1.1",
  - "mocha": "^2.4.5",
  + "mocha": "^5.0.5",
  "parallelshell": "^3.0.2",
  "react-addons-test-utils": "^15.4.0",
  "require-json": "0.0.1",
  