Bump koa from 2.11.0 to 3.0.3

Bumps [koa](https://github.com/koajs/koa) from 2.11.0 to 3.0.3.
- [Release notes](https://github.com/koajs/koa/releases)
- [Changelog](https://github.com/koajs/koa/blob/master/History.md)
- [Commits](koajs/koa@2.11.0...v3.0.3)

---
updated-dependencies:
- dependency-name: koa
  dependency-version: 3.0.3
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

package.json

@@ -74,7 +74,7 @@
     "graphql-upload": "^13.0.0",
     "jaeger-client": "^3.18.0",
     "js-base64": "^2.5.1",
-    "koa": "^2.11.0",
+    "koa": "^3.0.3",
     "koa-compose": "^4.1.0",
     "koa-compress": "^3.0.0",
     "koa-router": "^7.4.0",