Test with Ruby 3.1, 3.2, 3.3

Skips testing Rails 6.0 with Ruby 3.3 due to incompatibilities.

Author: HeyNonster

.circleci/config.yml

@@ -18,7 +18,7 @@ jobs:
       RUBYOPT: '-rostruct'
     steps:
       - checkout
-      - run: gem install bundler -v '1.17'
+      - run: gem install bundler
       - run:
           name: Install dependencies
           command: bundle install
@@ -42,6 +42,9 @@ workflows:
               ruby-version:
                 - '2.7'
                 - '3.0'
+                - '3.1'
+                - '3.2'
+                - '3.3'
               gemfile:
                 - gemfiles/rails6.0_graphql1.11.gemfile
                 - gemfiles/rails6.0_graphql1.12.gemfile
@@ -61,6 +64,13 @@ workflows:
                 - gemfiles/rails7.1_graphql2.1.gemfile
                 - gemfiles/rails7.1_graphql2.2.gemfile
                 - gemfiles/rails7.1_graphql2.3.gemfile
+            exclude:
+              - ruby-version: '3.3'
+                gemfile: gemfiles/rails6.0_graphql1.11.gemfile
+              - ruby-version: '3.3'
+                gemfile: gemfiles/rails6.0_graphql1.12.gemfile
+              - ruby-version: '3.3'
+                gemfile: gemfiles/rails6.0_graphql1.13.gemfile
       - report-coverage:
           requires:
             - test