Merge pull request #160 from k0kubun/ruby-4-0

Update required_ruby_version to allow Ruby 4.0

Author: whomwah

rqrcode.gemspec

@@ -29,7 +29,7 @@ Gem::Specification.new do |spec|
   spec.executables = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
   spec.require_paths = ["lib"]
 
-  spec.required_ruby_version = "~> 3.0"
+  spec.required_ruby_version = ">= 3.0"
   spec.add_dependency "rqrcode_core", "~> 2.0"
   spec.add_dependency "chunky_png", "~> 1.0"
   spec.add_development_dependency "bundler", "~> 2.0"