message: Move dev only deps to devDependencies.
diff: "dependencies": {
  "babel-plugin-istanbul": "^4.1.6",
  "babel-preset-jest": "^23.0.0",
  - "cpx": "^1.5.0",
  "fs-extra": "6.0.1",
  - "jest-config": "^23.0.0",
  - "lodash": "^4.17.10",
  - "pkg-dir": "^3.0.0",
  - "yargs": "^12.0.1"
  + "lodash": "^4.17.10"
  },
  "peerDependencies": {
  "babel-core": "^6.26.3 || ^7.0.0-0",
  "@types/yargs": "^11.0.0",
  "babel-core": "^6.26.3",
  "babel-preset-env": "^1.7.0",
  + "cpx": "^1.5.0",
  "cross-spawn": "latest",
  "cross-spawn-with-kill": "latest",
  "doctoc": "latest",
  "husky": "^0.14.3",
  "jest": "^23.0.0",
  + "jest-config": "^23.0.0",
  "lint-staged": "^7.1.2",
  + "pkg-dir": "^3.0.0",
  "prettier": "^1.12.1",
  "react": "16.4.1",
  "react-test-renderer": "16.4.1",
  "rimraf": "^2.6.2",
  "ts-jest": "23.0.0",
  "tslint": "^5.10.0",
  - "typescript": "^2.8.3"
  + "typescript": "^2.8.3",
  + "yargs": "^12.0.1"
  },
  "lint-staged": {
  "*.js": [
  