Update dependency apollo-server to v2.25.4 [SECURITY]

Author: renovate[bot]

package.json

@@ -14,7 +14,7 @@
   "dependencies": {
     "@graphql-modules/core": "0.7.11",
     "@graphql-modules/di": "0.7.11",
-    "apollo-server": "2.8.2",
+    "apollo-server": "2.25.4",
     "graphql": "14.4.2",
     "reflect-metadata": "0.1.13",
     "ts-node": "8.3.0",