Require ruby >= 3.0

Author: adamruzicka

.github/workflows/ruby.yml

@@ -15,6 +15,8 @@ jobs:
   rubocop:
     name: Rubocop
     uses: theforeman/actions/.github/workflows/rubocop.yml@v0
+    with:
+      ruby: 3.0
 
   test:
     name: Tests

smart_proxy_dynflow.gemspec

@@ -21,7 +21,7 @@ Gem::Specification.new do |gem|
   gem.require_paths = ["lib"]
   gem.license = 'GPL-3.0-only'
 
-  gem.required_ruby_version = '>= 2.7', '< 4'
+  gem.required_ruby_version = '>= 3.0'
 
   gem.add_runtime_dependency('dynflow', '>= 1.6', '< 3.0')
   gem.add_runtime_dependency('rest-client', '~> 2.0')