Merge pull request #174 from intercom/BL/readme

fix readme version

Author: bobjflong

README.md

@@ -22,7 +22,7 @@ This version of the gem is compatible with `Ruby 2.1` and above.
 
 Using bundler:
 
-    gem 'intercom', "~> 3.0.5"
+    gem 'intercom', "~> 3.0.6"
 
 ## Basic Usage