fix: Improve backward compatibility for Rails 6 and Ruby 3.0+

- Lower Rails requirement from 7.0 to 6.0 for ActiveAdmin 2.9 compatibility
- Lower Ruby requirement from 3.2 to 3.0 for broader compatibility
- Update CI workflows to test with Ruby 3.0, 3.1, 3.2 where appropriate
- Maintain Ruby 3.2+ for ActiveAdmin 4 and Rails 8 tests

.github/workflows/specs.yml

@@ -17,10 +17,10 @@ jobs:
       matrix:
         include:
           # Legacy ActiveAdmin 2.x/3.x support
-          - ruby: '3.2'
+          - ruby: '3.0'
             rails: '7.0'
             activeadmin: '~> 2.9'
-          - ruby: '3.2'
+          - ruby: '3.1'
             rails: '7.1'
             activeadmin: '~> 3.0'
           - ruby: '3.2'

.github/workflows/specs_rails61.yml

@@ -13,7 +13,7 @@ jobs:
 
     strategy:
       matrix:
-        ruby: ['3.2']
+        ruby: ['3.0', '3.1', '3.2']
 
     env:
       RAILS_VERSION: 6.0

.github/workflows/specs_rails70.yml

@@ -13,7 +13,7 @@ jobs:
 
     strategy:
       matrix:
-        ruby: ['3.2', '3.3']
+        ruby: ['3.0', '3.1', '3.2']
 
     env:
       RAILS_VERSION: 7.0

activeadmin_quill_editor.gemspec

@@ -14,7 +14,7 @@ Gem::Specification.new do |spec|
   spec.email         = 'mat@blocknot.es'
   spec.homepage      = 'https://github.com/rs-pro/activeadmin-quill_editor'
 
-  spec.required_ruby_version = '>= 3.2'
+  spec.required_ruby_version = '>= 3.0'
 
   spec.metadata['homepage_uri']    = spec.homepage
   spec.metadata['changelog_uri']   = 'https://github.com/rs-pro/activeadmin-quill_editor/blob/main/CHANGELOG.md'
@@ -26,5 +26,5 @@ Gem::Specification.new do |spec|
   spec.require_paths = ['lib']
 
   spec.add_runtime_dependency 'activeadmin', '>= 2.9', '< 5' # rubocop:disable Gemspec/AddRuntimeDependency
-  spec.add_runtime_dependency 'rails', '>= 7.0'
+  spec.add_runtime_dependency 'rails', '>= 6.0'
 end