message: Update all devDependencies to latest versions.
diff: "source-map": "~0.6.1"
  },
  "devDependencies": {
  - "@babel/core": "^7.0.0-beta.54",
  - "@babel/parser": "^7.0.0-beta.54",
  - "@babel/preset-env": "^7.0.0-beta.54",
  + "@babel/core": "^7.2.2",
  + "@babel/parser": "^7.3.2",
  + "@babel/preset-env": "^7.3.1",
  "@types/esprima": "^4.0.2",
  "@types/glob": "^7.1.1",
  "@types/mocha": "^5.2.5",
  - "@types/node": "^10.12.9",
  + "@types/node": "^10.12.21",
  "esprima-fb": "^15001.1001.0-dev-harmony-fb",
  - "flow-parser": "^0.83.0",
  - "glob": "^7.1.2",
  - "mocha": "~5.2.0",
  - "reify": "^0.18.0",
  + "flow-parser": "^0.92.1",
  + "glob": "^7.1.3",
  + "mocha": "^5.2.0",
  + "reify": "^0.18.1",
  "ts-add-module-exports": "^1.0.0",
  "ts-emit-clean": "^1.0.0",
  - "ts-node": "^7.0.1",
  - "typescript": "^3.1.6"
  + "ts-node": "^8.0.2",
  + "typescript": "^3.3.3"
  },
  "engines": {
  "node": ">= 4"
  