Loosen dependency on async-websocket

Author: svoop

rodbot.gemspec

@@ -64,7 +64,7 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency 'rotp', '~> 6'
   spec.add_development_dependency 'matrix_sdk', '~> 2'
   spec.add_development_dependency 'slack-ruby-client', '~> 2'
-  spec.add_development_dependency 'async-websocket', '~> 0.8.0'
+  spec.add_development_dependency 'async-websocket', '~> 0'
 
   spec.add_development_dependency 'rake'
   spec.add_development_dependency 'minitest'