chore(deps): bump graphql from 15.8.0 to 16.6.0

Bumps [graphql](https://github.com/graphql/graphql-js) from 15.8.0 to 16.6.0.
- [Release notes](https://github.com/graphql/graphql-js/releases)
- [Commits](graphql/graphql-js@v15.8.0...v16.6.0)

---
updated-dependencies:
- dependency-name: graphql
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

package.json

@@ -67,7 +67,7 @@
     "axios": "1.2.0-alpha.1",
     "class-transformer": "^0.5.1",
     "class-validator": "^0.13.2",
-    "graphql": "15.8.0",
+    "graphql": "16.6.0",
     "graphql-tools": "7.0.4",
     "hbs": "^4.2.0",
     "mongoose": "^6.6.5",