Create funding.json

requirements for rpgf4

Author: divine-comedian

funding.json

@@ -0,0 +1,5 @@
+{
+  "opRetro": {
+    "projectId": "0xe434930e189c807b137ff0d8e2fa6a95eaa57dde574143a02ca0d7fb31a40bea"
+  }
+}