Add Ruby 3.4 to CI (#69)

Add Ruby 3.4 to CI
Also use --enable-frozen-string-literal in CI to ensure compatibility

Author: westonganger

.github/workflows/test.yml

@@ -16,25 +16,25 @@ jobs:
       matrix:
         include:
           ### TEST RUBY VERSIONS
-          - ruby: "2.5"
           - ruby: "2.6"
           - ruby: "2.7"
           - ruby: "3.0"
             db_gem_version: "~> 1.4" # fixes sqlite3 gem dependency issue
           - ruby: "3.1"
           - ruby: "3.2"
           - ruby: "3.3"
+          - ruby: "3.4"
           ### TEST RAILS VERSIONS
           - ruby: "2.6"
             rails_version: "~> 6.1.0"
           - ruby: "3.3"
             rails_version: "~> 7.0.0"
             db_gem_version: "~> 1.4" # fixes sqlite3 gem dependency issue
-          - ruby: "3.3"
+          - ruby: "3.4"
             rails_version: "~> 7.1.0"
-          - ruby: "3.3"
+          - ruby: "3.4"
             rails_version: "~> 7.2.0"
-          - ruby: "3.3"
+          - ruby: "3.4"
             rails_version: "~> 8.0.0"
           ### DB TESTING TESTING
           - ruby: 3.3
@@ -104,4 +104,4 @@ jobs:
     - name: Run test
       run: |
         bundle install
-        bundle exec rake test
+        RUBYOPT='--enable-frozen-string-literal' bundle exec rake test