chore(deps): update dependency @pact-foundation/pact to v16

Ref: PACT-445

Author: pactflow-renovate-bot[bot]

package.json

@@ -44,7 +44,7 @@
   },
   "devDependencies": {
     "@babel/preset-env": "^7.26.0",
-    "@pact-foundation/pact": "^15.0.0",
+    "@pact-foundation/pact": "^16.0.0",
     "@types/jest": "^30.0.0",
     "@typescript-eslint/eslint-plugin": "^8.18.0",
     "@typescript-eslint/parser": "^8.18.0",