Add Rails 8.2 support (#225)

* Add Rails 8.2 support

Updates the gemspec to support Rails 8.2.x by changing the upper bound
from < 8.2.0 to < 8.3.0 for actionpack, activesupport, and railties.

Also adds a rails-8.2 appraisal configuration for testing against
Rails 8.2.0.alpha.

* Temporarily remove the rails-8.2 appraisal until the 8.2.0.alpha branch has been created

Author: lylo

cloudflare-rails.gemspec

@@ -29,9 +29,9 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency 'rubocop-rails', '~> 2.33.4'
   spec.add_development_dependency 'rubocop-rspec', '~> 3.7.0'
   spec.add_development_dependency 'webmock', '~> 3.25.0'
-  spec.add_dependency 'actionpack', '>= 7.2.0', '< 8.2.0'
-  spec.add_dependency 'activesupport', '>= 7.2.0', '< 8.2.0'
-  spec.add_dependency 'railties', '>= 7.2.0', '< 8.2.0'
+  spec.add_dependency 'actionpack', '>= 7.2.0', '< 8.3.0'
+  spec.add_dependency 'activesupport', '>= 7.2.0', '< 8.3.0'
+  spec.add_dependency 'railties', '>= 7.2.0', '< 8.3.0'
   spec.add_dependency 'zeitwerk', '>= 2.5.0'
 
   spec.required_ruby_version = '>= 3.2.0'