chore(deps): update dependency @koa/cors to v3

Author: renovate-bot

package-lock.json

@@ -26,7 +26,7 @@
   },
   "dependencies": {
     "@apollographql/graphql-playground-html": "^1.6.6",
-    "@koa/cors": "^2.2.1",
+    "@koa/cors": "^3.0.0",
     "@types/accepts": "^1.3.5",
     "@types/cors": "^2.8.4",
     "@types/koa": "^2.0.46",