Update dependency graphql to v16.6.0 (#26)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

package-lock.json

@@ -7,7 +7,7 @@
     "@graphql-codegen/typescript": "2.7.3",
     "@graphql-codegen/typescript-operations": "2.5.3",
     "@cloudflare/workers-types": "3.14.1",
-    "graphql": "16.5.0",
+    "graphql": "16.6.0",
     "typescript": "4.7.4",
     "wrangler": "2.0.25"
   },