build(deps-dev): bump koa from 2.16.0 to 3.0.3

Bumps [koa](https://github.com/koajs/koa) from 2.16.0 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@2.16.0...v3.0.3)

---
updated-dependencies:
- dependency-name: koa
  dependency-version: 3.0.3
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

package-lock.json

@@ -18,7 +18,7 @@
     "eslint-plugin-promise": "^5.1.0",
     "eslint-plugin-standard": "^5.0.0",
     "jest": "^29.7.0",
-    "koa": "^2.13.1",
+    "koa": "^3.0.3",
     "supertest": "^7.0.0"
   },
   "scripts": {