fix(deps): update dependency koa to v2.13.3 (#283)

Co-authored-by: Renovate Bot <bot@renovateapp.com>

Author: renovate[bot]

example/koa/package.json

@@ -31,6 +31,6 @@
     "tsbb": "^3.3.0"
   },
   "dependencies": {
-    "koa": "2.13.2"
+    "koa": "2.13.3"
   }
 }