Update dependency lwc-webpack-plugin to v3.1.0 (#2533)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

libraries/lwc/package.json

@@ -21,7 +21,7 @@
   },
   "dependencies": {
     "lwc": "5.0.0",
-    "lwc-webpack-plugin": "3.0.5"
+    "lwc-webpack-plugin": "3.1.0"
   },
   "wireit": {
     "test": {