chore(deps): update dependency webpack to ^4.33.0 (#1966)

Author: renovate[bot]

package-lock.json

@@ -100,7 +100,7 @@
     "style-loader": "^0.23.1",
     "supertest": "^4.0.2",
     "url-loader": "^1.1.2",
-    "webpack": "^4.32.2",
+    "webpack": "^4.33.0",
     "webpack-cli": "^3.3.2",
     "ws": "^6.2.1"
   },