.travis.yml in slack-ruby-bot-0.11.1 vs .travis.yml in slack-ruby-bot-0.11.2

- old
+ new

@@ -17,9 +17,11 @@
       env: CONCURRENCY=faye-websocket WITH_GIPHY=true
     - rvm: 2.3.0
       env: CONCURRENCY=celluloid-io WITH_GIPHY_CLIENT=true
     - rvm: 2.3.0
       env: CONCURRENCY=faye-websocket WITH_GIPHY_CLIENT=true
+    - rvm: 2.5
+      env: CONCURRENCY=async-websocket WITH_GIPHY_CLIENT=true
     - rvm: ruby-head
     - rvm: jruby-head
   allow_failures:
     - rvm: ruby-head
     - rvm: jruby-head