Test with ruby head

.github/workflows/ci.yml

@@ -59,7 +59,7 @@
       fail-fast: false
       matrix:
         # Test against all versions supported by rubygems
-        ruby_version: ["2.7", "3.0", "3.1", "3.2", "3.3", "3.4", "4.0"]
+        ruby_version: ["2.7", "3.0", "3.1", "3.2", "3.3", "3.4", "4.0", "head"]
         sys:
           - os: ubuntu-latest
             rust_toolchain: ${{ needs.fetch_ci_data.outputs.minimum-supported-rust-version }}
@@ -81,14 +81,10 @@
             sys:
               os: macos-15
               rust_toolchain: stable
           - ruby_version: mswin
             sys:
               os: windows-2022
               rust_toolchain: stable-x86_64-pc-windows-msvc
-          - ruby_version: "ruby-head"
-            sys:
-              os: ubuntu-latest
-              rust_toolchain: stable
           # TODO: Remove allow_failure after 2025-01-01 (known Windows compatibility issues)
           - ruby_version: "3.4"
             allow_failure: true
@@ -183,7 +179,7 @@
 
       - name: 🧪 Cargo test
         shell: bash
         if: matrix.ruby_version != 'mswin'
         run: |
           ulimit -c unlimited
           bundle exec rake test:cargo

.github/workflows/integration.yml

@@ -33,7 +33,7 @@ jobs:
             run: cargo test --release
         os: ["ubuntu-latest", "windows-latest", "macos-15"]
         rust: ["stable"]
-        ruby: ["3.2", "3.3", "3.4"]
+        ruby: ["3.2", "3.3", "3.4", "4.0", "head"]
         exclude:
           - repo:
               slug: magnus-0.5