Upgraded to slack-ruby-client 0.14.4.

Author: dblock

Gemfile.lock

@@ -228,7 +228,7 @@ GEM
     slack-ruby-bot-server-mailchimp (0.2.0)
       mailchimp_api_v3
       slack-ruby-bot-server (>= 0.10.0)
-    slack-ruby-client (0.14.3)
+    slack-ruby-client (0.14.4)
       activesupport
       faraday (>= 0.9)
       faraday_middleware