chore(package): update webpack to version 4.39.1

Author: greenkeeper[bot]

package.json

@@ -51,7 +51,7 @@
  "tslint-react": "^4.0.0",
  "tslint-sonarts": "^1.9.0",
  "typescript": "^3.5.1",
- "webpack": "^4.38.0",
+ "webpack": "^4.39.1",
  "webpack-cli": "^3.3.2",
  "webpack-dev-server": "^3.5.0"
  },