Bump @types/supertest from 2.0.14 to 2.0.15

Bumps [@types/supertest](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/supertest) from 2.0.14 to 2.0.15.
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/supertest)

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

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

package.json

@@ -45,7 +45,7 @@
     "@types/express": "^4.17.19",
     "@types/jest": "29.5.5",
     "@types/node": "20.8.7",
-    "@types/supertest": "^2.0.14",
+    "@types/supertest": "^2.0.15",
     "@typescript-eslint/eslint-plugin": "^5.62.0",
     "@typescript-eslint/parser": "^5.62.0",
     "eslint": "^8.52.0",