Allow ruby 4.0

Author: sue445

_gem/go_gem.gemspec

@@ -12,7 +12,7 @@ Gem::Specification.new do |spec|
   spec.description = "Helpers for compiling Go extensions for ruby"
   spec.homepage = "https://github.com/ruby-go-gem/go-gem-wrapper"
   spec.license = "MIT"
-  spec.required_ruby_version = [">= 3.3.0", "< 3.5.0"]
+  spec.required_ruby_version = [">= 3.3.0", "< 4.1.0"]
 
   spec.metadata["homepage_uri"] = spec.homepage
   spec.metadata["source_code_uri"] = "#{spec.homepage}/tree/main/_gem"