Update dependency express to v4.20.0 [SECURITY]

Author: renovate[bot]

package.json

@@ -31,7 +31,7 @@
     "apollo-server-express": "2.13.1",
     "apollo-server-testing": "2.13.1",
     "cors": "2.8.5",
-    "express": "4.17.1",
+    "express": "4.20.0",
     "graphql": "15.0.0",
     "graphql-import": "1.0.2",
     "graphql-scalars": "1.1.2",