chore(deps): update dependency webpack to v4.33.0 (#415)

Author: renovate[bot]

package-lock.json

@@ -61,7 +61,7 @@
     "prettier": "1.17.1",
     "standard-version": "6.0.1",
     "supertest": "4.0.2",
-    "webpack": "4.32.2"
+    "webpack": "4.33.0"
   },
   "keywords": [
     "webpack",