Support Ruby 4.0

Author: NARKOZ

.github/workflows/ci.yml

@@ -20,6 +20,7 @@ jobs:
           - 3.2
           - 3.3
           - 3.4
+          - 4.0
     name: Ruby ${{ matrix.ruby }} test
     steps:
       - uses: actions/checkout@v6

.rubocop.yml

@@ -40,5 +40,8 @@ RSpec/SpecFilePathFormat:
 Bundler/OrderedGems:
   Enabled: false
 
+Gemspec/OrderedDependencies:
+  Enabled: false
+
 Gemspec/DevelopmentDependencies:
   Enabled: false

gitlab.gemspec

@@ -31,6 +31,7 @@ Gem::Specification.new do |gem|
   gem.required_ruby_version = '>= 3.2'
 
   gem.add_runtime_dependency 'base64'
+  gem.add_runtime_dependency 'readline'
   gem.add_runtime_dependency 'httparty', '~> 0.20'
   gem.add_runtime_dependency 'terminal-table', '>= 1.5.1'