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

Author: renovate[bot]

server/package.json

@@ -25,7 +25,7 @@
     "@graphql-modules/epoxy": "0.2.17",
     "@graphql-modules/sonar": "0.2.17",
     "@types/mongodb": "3.1.17",
-    "apollo-server": "2.3.1",
+    "apollo-server": "2.25.4",
     "graphql": "14.1.1",
     "graphql-code-generator": "0.15.0",
     "graphql-codegen-add": "0.15.0",