chore: test send on koa@3

Author: jonathanong

package.json

@@ -42,7 +42,7 @@
     "brotli": "^1.3.3",
     "eslint-config-xo-lass": "^2.0.1",
     "jest": "^29.5.0",
-    "koa": "^2.14.1",
+    "koa": "^3.0.0",
     "supertest": "^6.3.3",
     "ts-jest": "^29.0.5",
     "ts-node": "^10.9.1",