cancando.gemspec in cancando-1.1 vs cancando.gemspec in cancando-1.2

@@ -15,14 +15,14 @@
   spec.platform      = Gem::Platform::RUBY
 
   spec.files         = Dir.chdir(File.expand_path('..', __FILE__)) do
     `git ls-files -z`.split("\x0").reject { |f| f.match(%r{^(test|spec|features)/}) }
   end
-  spec.bindir        = 'exe'
-  spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
   spec.require_paths = ['lib']
 
   spec.add_development_dependency 'bundler', '~> 2.0'
   spec.add_development_dependency 'cancancan', '~> 2.0'
   spec.add_development_dependency 'rake', '~> 12.3'
   spec.add_development_dependency 'rspec', '~> 3.0'
+
+  spec.required_ruby_version = '>= 2.2.0'
 end