Release rails dependencies

telegram-bot.gemspec

@@ -19,8 +19,8 @@ Gem::Specification.new do |spec|
 
   spec.required_ruby_version = '~> 2.0'
 
-  spec.add_dependency 'actionpack', '>= 4.0', '< 5.2'
-  spec.add_dependency 'activesupport', '>= 4.0', '< 5.2'
+  spec.add_dependency 'actionpack', '>= 4.0', '< 6.0'
+  spec.add_dependency 'activesupport', '>= 4.0', '< 6.0'
   spec.add_dependency 'httpclient', '~> 2.7'
 
   spec.add_development_dependency 'bundler', '~> 1.11'