Update dependency @koa/router to v15

Author: renovate[bot]

api-server/package-lock.json

@@ -14,7 +14,7 @@
   "license": "MIT",
   "repository": "git@github.com:salsita/siros-postgres.git",
   "dependencies": {
-    "@koa/router": "10.1.1",
+    "@koa/router": "15.4.0",
     "dotenv": "8.6.0",
     "koa": "2.13.4",
     "koa-bodyparser": "4.3.0",