Allow bundler-4.x

Author: larskanis

rubyinstaller-build.gemspec

@@ -23,6 +23,6 @@ Gem::Specification.new do |spec|
   spec.require_paths = ["lib"]
 
   spec.add_development_dependency "rake", "~> 12.0"
-  spec.add_development_dependency "bundler", ">= 1.14", "< 4"
+  spec.add_development_dependency "bundler", ">= 1.14", "< 5.a"
   spec.add_development_dependency "minitest", "~> 5.0"
 end