Bump graphql-client from 0.18.0 to 0.23.0

Bumps [graphql-client](https://github.com/github-community-projects/graphql-client) from 0.18.0 to 0.23.0.
- [Release notes](https://github.com/github-community-projects/graphql-client/releases)
- [Commits](https://github.com/github-community-projects/graphql-client/commits/v0.23.0)

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

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

Gemfile.lock

@@ -192,9 +192,9 @@ GEM
       railties
       sprockets-rails
     graphql (2.0.17)
-    graphql-client (0.18.0)
+    graphql-client (0.23.0)
       activesupport (>= 3.0)
-      graphql
+      graphql (>= 1.13.0)
     hashdiff (1.0.1)
     hashie (5.0.0)
     i18n (1.14.5)
@@ -246,7 +246,7 @@ GEM
     method_source (1.0.0)
     mini_magick (4.12.0)
     mini_mime (1.1.2)
-    minitest (5.23.1)
+    minitest (5.24.1)
     msgpack (1.6.0)
     multi_xml (0.6.0)
     mutex_m (0.2.0)