Bump @graphql-tools/schema from 8.1.2 to 9.0.19

Bumps [@graphql-tools/schema](https://github.com/ardatan/graphql-tools/tree/HEAD/packages/schema) from 8.1.2 to 9.0.19.
- [Release notes](https://github.com/ardatan/graphql-tools/releases)
- [Changelog](https://github.com/ardatan/graphql-tools/blob/master/packages/schema/CHANGELOG.md)
- [Commits](https://github.com/ardatan/graphql-tools/commits/@graphql-tools/schema@9.0.19/packages/schema)

---
updated-dependencies:
- dependency-name: "@graphql-tools/schema"
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

package.json

@@ -22,7 +22,7 @@
     "dependencies": {
         "graphql": "^15.8.0",
         "@graphql-tools/merge": "6.2.14",
-        "@graphql-tools/schema": "8.1.2",
+        "@graphql-tools/schema": "9.0.19",
         "uuid": "9.0.0"
     }
 }