Upgrade RuboCop 0.37.1 -> 0.37.2

sds · sds · commit 53761f7f6dd5 · 2016-02-11T11:33:56.000-05:00
Gemnasium's UI was out of date and lead me to not installing the latest
version.
diff --git a/Gemfile b/Gemfile
@@ -4,6 +4,6 @@ source 'https://rubygems.org'
 gem 'coveralls'
 
 # Pin RuboCop for Travis builds.
-gem 'rubocop', '0.37.1'
+gem 'rubocop', '0.37.2'
 
 gemspec
