Add Ruby 4.0 to CI matrix.

Author: sleepingkingstudios

.github/workflows/ci.yml

@@ -17,7 +17,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby-version: ['3.1', '3.2', '3.3', '3.4']
+        ruby-version: ['3.1', '3.2', '3.3', '3.4', '4.0']
 
     steps:
     - uses: actions/checkout@v4
@@ -43,7 +43,7 @@ jobs:
     # change this to (see https://github.com/ruby/setup-ruby#versioning):
       uses: ruby/setup-ruby@v1
       with:
-        ruby-version: '3.3'
+        ruby-version: '3.4'
         bundler-cache: true # runs 'bundle install' and caches installed gems automatically
     - name: Setup RSpec configuration
       run: cp .rspec.example .rspec

Gemfile

@@ -11,7 +11,9 @@ group :development, :test do
   gem 'byebug', '~> 11.1'
 
   gem 'rspec', '~> 3.13'
-  gem 'rspec-sleeping_king_studios', '~> 2.8'
+  gem 'rspec-sleeping_king_studios',
+    branch: 'chore/ruby-4-0',
+    git:    'https://github.com/sleepingkingstudios/rspec-sleeping_king_studios'
   gem 'rubocop', '~> 1.82'
   gem 'rubocop-rspec', '~> 3.8'
   gem 'simplecov', '~> 0.22'

sleeping_king_studios-docs.gemspec

@@ -26,7 +26,7 @@ Gem::Specification.new do |gem|
     'rubygems_mfa_required' => 'true'
   }
 
-  gem.required_ruby_version = '~> 3.1'
+  gem.required_ruby_version = ['>= 3.1', '< 5']
   gem.require_path = 'lib'
   gem.files        =
     Dir[