[rb] restrict from using new rubyzip version
fixes
@@ -47,7 +47,7 @@ Gem::Specification.new do |s|
s.add_runtime_dependency 'childprocess', ['>= 0.5', '< 5.0']
s.add_runtime_dependency 'rexml', ['~> 3.2', '>= 3.2.5']
- s.add_runtime_dependency 'rubyzip', ['>= 1.2.2']
+ s.add_runtime_dependency 'rubyzip', ['>= 1.2.2', '< 3.0']
s.add_runtime_dependency 'websocket', ['~> 1.0']
# childprocess requires ffi on windows but doesn't declare it in its dependencies
