feat: upgrade @graphql-tools/schema from 8.5.1 to 9.0.0

Snyk has created this PR to upgrade @graphql-tools/schema from 8.5.1 to 9.0.0.

See this package in npm:
https://www.npmjs.com/package/@graphql-tools/schema

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

@@ -22,7 +22,7 @@
     "@graphql-yoga/node": "2.6.0",
     "@graphql-tools/utils": "8.9.0",
     "@graphql-tools/merge": "8.3.1",
-    "@graphql-tools/schema": "8.5.1",
+    "@graphql-tools/schema": "9.0.0",
     "@parse/fs-files-adapter": "1.2.2",
     "@parse/push-adapter": "4.1.2",
     "bcryptjs": "2.4.3",