Merge branch 'rs-update-sass-rails' into 'master'

Bump sass-rails to ~> 5.0.0

Addressing gitlab-org/gitlab-ce#2857

See merge request !2184

Gemfile

@@ -190,7 +190,7 @@ gem 'mousetrap-rails', '~> 1.4.6'
 # Detect and convert string character encoding
 gem 'charlock_holmes', '~> 0.7.3'
 
-gem "sass-rails", '~> 4.0.5'
+gem "sass-rails", '~> 5.0.0'
 gem "coffee-rails", '~> 4.1.0'
 gem "uglifier", '~> 2.7.2'
 gem 'turbolinks', '~> 2.5.0'

Gemfile.lock

@@ -647,12 +647,13 @@ GEM
     safe_yaml (1.0.4)
     sanitize (2.1.0)
       nokogiri (>= 1.4.4)
-    sass (3.2.19)
-    sass-rails (4.0.5)
+    sass (3.4.20)
+    sass-rails (5.0.4)
       railties (>= 4.0.0, < 5.0)
-      sass (~> 3.2.2)
-      sprockets (~> 2.8, < 3.0)
-      sprockets-rails (~> 2.0)
+      sass (~> 3.1)
+      sprockets (>= 2.8, < 4.0)
+      sprockets-rails (>= 2.0, < 4.0)
+      tilt (>= 1.1, < 3)
     sawyer (0.6.0)
       addressable (~> 2.3.5)
       faraday (~> 0.8, < 0.10)
@@ -934,7 +935,7 @@ DEPENDENCIES
   rubocop (~> 0.35.0)
   ruby-fogbugz (~> 0.2.1)
   sanitize (~> 2.0)
-  sass-rails (~> 4.0.5)
+  sass-rails (~> 5.0.0)
   sdoc (~> 0.3.20)
   seed-fu (~> 2.3.5)
   select2-rails (~> 3.5.9)