fix: upgrade @graphql-tools/stitch from 6.0.12 to 6.0.13 (#6845)

Snyk has created this PR to upgrade @graphql-tools/stitch from 6.0.12 to 6.0.13.

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

See this project in Snyk:
https://app.snyk.io/org/acinader/project/8c1a9edb-c8f5-4dc1-b221-4d6030a323eb?utm_source=github&utm_medium=upgrade-pr

Co-authored-by: Diamond Lewis <findlewis@gmail.com>

package.json

@@ -20,7 +20,7 @@
   "license": "BSD-3-Clause",
   "dependencies": {
     "@apollographql/graphql-playground-html": "1.6.26",
-    "@graphql-tools/stitch": "6.0.12",
+    "@graphql-tools/stitch": "6.0.13",
     "@graphql-tools/utils": "6.0.12",
     "@parse/fs-files-adapter": "1.0.1",
     "@parse/push-adapter": "3.2.0",