chore(deps): update dependency @types/supertest to v6

Author: renovate[bot]

package-lock.json

@@ -49,7 +49,7 @@
     "@types/koa__cors": "4.0.3",
     "@types/koa-bodyparser": "4.3.12",
     "@types/node": "16.18.73",
-    "@types/supertest": "2.0.16",
+    "@types/supertest": "6.0.2",
     "@typescript-eslint/eslint-plugin": "6.19.0",
     "@typescript-eslint/parser": "6.19.0",
     "cspell": "7.3.9",