chore: add funding

Author: ricardogobbosouza

package.json

@@ -7,6 +7,10 @@
   "author": "Ricardo Gobbo de Souza <[email protected]>",
   "homepage": "https://github.com/webpack-contrib/eslint-webpack-plugin",
   "bugs": "https://github.com/webpack-contrib/eslint-webpack-plugin/issues",
+  "funding": {
+    "type": "opencollective",
+    "url": "https://opencollective.com/webpack"
+  },
   "main": "dist/cjs.js",
   "engines": {
     "node": ">= 10.13.0"