chore(deps): update dependency apollo-server-express to v3

Author: renovate-bot

package.json

@@ -57,7 +57,7 @@
     "ts-node": "9.1.1",
     "tslint": "5.20.1",
     "typescript": "4.1.3",
-    "apollo-server-express": "2.19.1",
+    "apollo-server-express": "3.6.6",
     "keycloak-connect": "12.0.1"
   },
   "peerDependencies": {