chore(deps): update test dependencies

Author: renovate[bot]

package.json

@@ -50,11 +50,11 @@
     "@types/proxyquire": "^1.3.31",
     "@types/sinon": "^17.0.2",
     "@types/sinon-chai": "^3.2.12",
-    "@types/supertest": "^2.0.16",
+    "@types/supertest": "^6.0.2",
     "@voxpelli/eslint-config": "^19.0.0",
     "@voxpelli/tsconfig": "^10.0.0",
-    "c8": "^8.0.1",
-    "chai": "^4.3.10",
+    "c8": "^9.0.0",
+    "chai": "^5.0.0",
     "chai-as-promised": "^7.1.1",
     "cookie-signature": "^1.2.1",
     "cookiejar": "^2.1.4",