chore: update webpack

Author: renovate-bot

package.json

@@ -53,10 +53,10 @@
     "standard-version": "4.4.0",
     "tap-spec": "5.0.0",
     "tape": "4.13.3",
-    "uglifyjs-webpack-plugin": "1.3.0",
-    "webpack": "4.44.2",
-    "webpack-cli": "3.3.12",
-    "webpack-merge": "4.2.2"
+    "uglifyjs-webpack-plugin": "2.2.0",
+    "webpack": "5.21.2",
+    "webpack-cli": "4.5.0",
+    "webpack-merge": "5.7.3"
   },
   "dependencies": {},
   "nyc": {