upgrade koa and koa-body

Author: nicolodavis

package-lock.json

@@ -131,8 +131,8 @@
     "@koa/cors": "^2.2.1",
     "flatted": "^0.2.3",
     "immer": "^1.8.0",
-    "koa": "^2.5.2",
-    "koa-body": "^2.5.0",
+    "koa": "^2.7.0",
+    "koa-body": "^4.1.0",
     "koa-router": "^7.2.1",
     "koa-socket-2": "^1.0.17",
     "lru-cache": "^4.1.1",