fix: upgrade graphql from 15.6.0 to 15.6.1

Snyk has created this PR to upgrade graphql from 15.6.0 to 15.6.1.

See this package in npm:
https://www.npmjs.com/package/graphql

See this project in Snyk:
https://app.snyk.io/org/acinader/project/21343059-02d9-4182-87d7-718a44b181ef?utm_source=github&utm_medium=referral&page=upgrade-pr

Author: snyk-bot

package-lock.json

@@ -33,7 +33,7 @@
     "deepcopy": "2.1.0",
     "express": "4.17.1",
     "follow-redirects": "1.14.2",
-    "graphql": "15.6.0",
+    "graphql": "15.6.1",
     "graphql-list-fields": "2.0.2",
     "graphql-relay": "0.9.0",
     "graphql-tag": "2.12.5",