chore: update the dependencies for compatibility with fastify v5.x

Author: Tony133

packages/mercurius/package.json

@@ -27,24 +27,24 @@
     "tslib": "2.8.1"
   },
   "devDependencies": {
-    "@mercuriusjs/federation": "3.0.0",
-    "@mercuriusjs/gateway": "3.0.1",
+    "@mercuriusjs/federation": "4.0.0",
+    "@mercuriusjs/gateway": "4.0.0",
     "@nestjs/common": "10.4.15",
     "@nestjs/platform-fastify": "10.4.15",
     "@nestjs/testing": "10.4.15",
-    "fastify": "4.29.0",
-    "mercurius": "14.1.0",
+    "fastify": "5.1.0",
+    "mercurius": "15.1.0",
     "mercurius-integration-testing": "9.0.0"
   },
   "peerDependencies": {
     "@apollo/subgraph": "^2.0.0",
-    "@mercuriusjs/federation": "^1.0.0 || ^2.0.0 || ^3.0.0",
-    "@mercuriusjs/gateway": "^1.0.0 || ^2.0.0 || ^3.0.0",
+    "@mercuriusjs/federation": "^1.0.0 || ^2.0.0 || ^3.0.0 || ^4.0.0",
+    "@mercuriusjs/gateway": "^1.0.0 || ^2.0.0 || ^3.0.0 || ^4.0.0",
     "@nestjs/common": "^9.3.8 || ^10.0.0",
     "@nestjs/graphql": "^12.0.0",
-    "fastify": "^4.12.0",
+    "fastify": "^5.1.0",
     "graphql": "^16.0.0",
-    "mercurius": "^12.0.0 || ^13.0.0 || ^14.0.0"
+    "mercurius": "^12.0.0 || ^13.0.0 || ^14.0.0 || ^15.0.0"
   },
   "peerDependenciesMeta": {
     "@apollo/subgraph": {