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

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 2.14.2 to 2.16.0
- [Release notes](https://github.com/koajs/koa/releases)
- [Changelog](https://github.com/koajs/koa/blob/master/History.md)
- [Commits](koajs/koa@2.14.2...2.16.0)

Updates `@types/koa` from 2.13.6 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-minor
- dependency-name: "@types/koa"
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

package-lock.json

@@ -58,7 +58,7 @@
     "core"
   ],
   "dependencies": {
-    "@types/koa": "^2.11.6",
+    "@types/koa": "^2.15.0",
     "@types/ws": "^7.4.0",
     "@web/parse5-utils": "^2.1.0",
     "chokidar": "^4.0.1",
@@ -67,7 +67,7 @@
     "get-stream": "^6.0.0",
     "is-stream": "^2.0.0",
     "isbinaryfile": "^5.0.0",
-    "koa": "^2.13.0",
+    "koa": "^2.16.0",
     "koa-etag": "^4.0.0",
     "koa-send": "^5.0.1",
     "koa-static": "^5.0.0",