chore(deps): bump koa and @types/koa (#3709)

Bumps [koa](https://github.com/koajs/koa) and [@types/koa](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/koa). These dependencies needed to be updated together.

Updates `koa` from 2.15.0 to 2.15.3
- [Changelog](https://github.com/koajs/koa/blob/2.15.3/History.md)
- [Commits](koajs/koa@2.15.0...2.15.3)

Updates `@types/koa` from 2.13.12 to 2.15.0
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/koa)

---
updated-dependencies:
- dependency-name: koa
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: "@types/koa"
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Yashasvi Bajpai <[email protected]>

package.json

@@ -92,7 +92,7 @@
     "json-size": "^1.0.0",
     "jsontoxml": "^1.0.1",
     "jstoxml": "^5.0.2",
-    "koa": "^2.14.1",
+    "koa": "^2.15.3",
     "koa-bodyparser": "^4.4.0",
     "koa2-swagger-ui": "^5.7.0",
     "libphonenumber-js": "^1.11.1",
@@ -128,7 +128,7 @@
     "@types/fast-json-stable-stringify": "^2.1.0",
     "@types/jest": "^29.5.1",
     "@types/jsonpath": "^0.2.4",
-    "@types/koa": "^2.13.6",
+    "@types/koa": "^2.15.0",
     "@types/koa-bodyparser": "^4.3.10",
     "@types/lodash": "^4.14.197",
     "@types/node": "^20.2.5",