Merge pull request #365 from webtorrent/renovate_bufferutil-4.x

chore(deps): update dependency bufferutil to ^4.0.3

Author: DiegoRBaquero

package.json

@@ -69,7 +69,7 @@
   "license": "MIT",
   "main": "index.js",
   "optionalDependencies": {
-    "bufferutil": "^4.0.1",
+    "bufferutil": "^4.0.3",
     "utf-8-validate": "^5.0.2"
   },
   "repository": {