chore(package): update webpack to version 4.38.0

Author: greenkeeper[bot]

package.json

@@ -76,7 +76,7 @@
  "ts-node": "8.0.3",
  "tslint": "5.14.0",
  "typescript": "3.3.3333",
- "webpack": "^4.29.6",
+ "webpack": "^4.38.0",
  "webpack-cli": "3.3.0",
  "yargs": "13.2.2"
  },