⬆️ Bump graphql from 2.2.7 to 2.2.8 (#35)

Bumps [graphql](https://github.com/rmosolgo/graphql-ruby) from 2.2.7 to 2.2.8.
- [Release notes](https://github.com/rmosolgo/graphql-ruby/releases)
- [Changelog](https://github.com/rmosolgo/graphql-ruby/blob/master/CHANGELOG.md)
- [Commits](rmosolgo/graphql-ruby@v2.2.7...v2.2.8)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

Gemfile.lock

@@ -26,7 +26,7 @@ GEM
     dotenv (2.8.1)
     drb (2.2.0)
       ruby2_keywords
-    graphql (2.2.7)
+    graphql (2.2.8)
     graphql-client (0.19.0)
       activesupport (>= 3.0)
       graphql