drop support for EOL ruby versions

Author: jonian

.github/workflows/build.yml

@@ -22,7 +22,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        ruby: ['2.7', '3.2', '3.3', '3.4', '4.0']
+        ruby: ['3.2', '3.3', '3.4', '4.0']
     runs-on: ${{ matrix.os }}
 
     steps:

.github/workflows/cross-compile.yml

@@ -38,7 +38,7 @@ jobs:
         id: cross-gem
         with:
           platform: ${{ matrix.platform }}
-          ruby-versions: "2.7,3.0,3.1,3.2,3.3,3.4,4.0"
+          ruby-versions: ${{ join(fromJSON(needs.ci-data.outputs.result).stable-ruby-versions, ',') }}
 
       - uses: actions/upload-artifact@v6
         with:

mrml.gemspec

@@ -17,7 +17,7 @@ Gem::Specification.new do |spec|
   spec.extensions    = Dir['ext/**/extconf.rb']
   spec.require_paths = ['lib']
 
-  spec.required_ruby_version = '>= 2.7'
+  spec.required_ruby_version = '>= 3.2'
 
   spec.add_runtime_dependency 'rb_sys'
 end