message: fix(deps): move nock to devDependencies
  Fix regression introduced in
diff: "google-proto-files": "^0.17.0",
  "is": "^3.2.1",
  "lodash.merge": "^4.6.1",
  - "nock": "^10.0.1",
  "protobufjs": "^6.8.8",
  "pumpify": "^1.5.1",
  "snakecase-keys": "^2.0.0",
  "intelli-espower-loader": "^1.0.1",
  "jsdoc": "^3.5.5",
  "mocha": "^5.2.0",
  + "nock": "^10.0.1",
  "nyc": "^13.0.1",
  "power-assert": "^1.6.0",
  "propprop": "^0.3.1",
  