Bump version to 2.7.2

Author: lautis

CHANGELOG.md

@@ -1,4 +1,5 @@
-## next
+## 2.7.2 (26 August 2015)
+
 - update UglifyJS to 2.4.24
 
 ## 2.7.1 (27 February 2015)

Gemfile

@@ -3,7 +3,7 @@ source "https://rubygems.org"
 gemspec
 
 if RUBY_VERSION >= '1.9'
-  gem 'rubocop', '~> 0.28', :group => [:development]
+  gem 'rubocop', '~> 0.28.0', :group => [:development]
 else
   gem 'execjs', '~> 2.0.2'
 end