⬆️ Bump @types/koa from 2.0.51 to 2.0.52

Bumps [@types/koa](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/koa) from 2.0.51 to 2.0.52.
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/koa)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

package.json

@@ -18,7 +18,7 @@
     "typescript": "^3.6.4"
   },
   "devDependencies": {
-    "@types/koa": "^2.0.51",
+    "@types/koa": "^2.0.52",
     "@types/koa-router": "^7.0.42",
     "@types/node": "^12.11.7",
     "nodemon": "^1.19.4"