chore(package.json): Add the funding field

Author: J3m5

package.json

@@ -20,6 +20,10 @@
     "email": "[email protected]",
     "url": "https://feathersjs-ecosystem.github.io."
   },
+  "funding": {
+    "type": "Github sponsor",
+    "url": "https://github.com/sponsors/marshallswain"
+  },
   "contributors": [],
   "bugs": {
     "url": "https://github.com/feathersjs-ecosystem/feathers-vuex/issues"