chore: add funding field to package.json (#208)

Author: harish-sethuraman

package.json

@@ -8,6 +8,10 @@
     "name": "Artem Sapegin",
     "url": "https://sapegin.me"
   },
+  "funding": {
+    "type": "opencollective",
+    "url": "https://opencollective.com/webpack"
+  },
   "homepage": "https://github.com/webpack-contrib/webpack-defaults",
   "bugs": "https://github.com/webpack-contrib/webpack-defaults/issues",
   "bin": {