Bump graphql from 15.6.1 to 16.6.0

Bumps [graphql](https://github.com/graphql/graphql-js) from 15.6.1 to 16.6.0.
- [Release notes](https://github.com/graphql/graphql-js/releases)
- [Commits](graphql/graphql-js@v15.6.1...v16.6.0)

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

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

Author: dependabot[bot]

package-lock.json

@@ -22,7 +22,7 @@
     "beautify": "0.0.8",
     "dotenv": "^10.0.0",
     "fs-extra": "^10.0.0",
-    "graphql": "^15.6.1",
+    "graphql": "^16.6.0",
     "graphql-request": "^3.5.0",
     "ical-generator": "^2.2.0",
     "moment": "^2.29.1",