Require Ruby 3.0+

Author: joe-sharp

ar-multidb.gemspec

@@ -20,7 +20,7 @@ Gem::Specification.new do |s|
   s.executables   = `git ls-files -- bin/*`.split("\n").map { |f| File.basename(f) }
   s.require_paths = ['lib']
 
-  s.required_ruby_version = '>= 2.5.0'
+  s.required_ruby_version = '>= 3.0.0'
 
   s.add_runtime_dependency 'activerecord', '>= 7.1', '< 8.1'
   s.add_runtime_dependency 'activesupport', '>= 7.1', '< 8.1'