fix(deps): update apollo graphql packages to v2.24.0

Author: renovate-bot

packages/voyager-server/package.json

@@ -24,8 +24,8 @@
     "@aerogear/voyager-conflicts": "0.9.0",
     "@aerogear/voyager-keycloak": "0.9.0",
     "@aerogear/voyager-tools": "0.9.0",
-    "apollo-server": "2.19.1",
-    "apollo-server-express": "2.19.1",
+    "apollo-server": "2.24.0",
+    "apollo-server-express": "2.24.0",
     "graphql-tools": "4.0.6"
   },
   "devDependencies": {