Bump sass-rails from 5.0.8 to 6.0.0

Bumps [sass-rails](https://github.com/rails/sass-rails) from 5.0.8 to 6.0.0.
- [Release notes](https://github.com/rails/sass-rails/releases)
- [Commits](rails/sass-rails@v5.0.8...v6.0.0)

Signed-off-by: dependabot-preview[bot] <[email protected]>

Gemfile

@@ -47,7 +47,7 @@ gem 'sentry-raven', '~> 2.0'
 gem 'inst_statsd', '~> 2.1.4'
 gem 'paul_bunyan', '~> 1.5'
 
-gem 'sass-rails', '~> 5.0.0'
+gem 'sass-rails', '~> 6.0.0'
 gem 'coffee-rails', '~> 5.0.0'
 gem 'coffee-script', '2.2.0'
 gem 'mini_racer', '~> 0.2'

Gemfile.lock

@@ -409,17 +409,16 @@ GEM
     ruby2_keywords (0.0.4)
     rufus-scheduler (3.4.2)
       et-orbi (~> 1.0)
-    sass (3.7.4)
-      sass-listen (~> 4.0.0)
-    sass-listen (4.0.0)
-      rb-fsevent (~> 0.9, >= 0.9.4)
-      rb-inotify (~> 0.9, >= 0.9.7)
-    sass-rails (5.0.8)
-      railties (>= 5.2.0)
-      sass (~> 3.1)
-      sprockets (>= 2.8, < 4.0)
-      sprockets-rails (>= 2.0, < 4.0)
-      tilt (>= 1.1, < 3)
+    sass-rails (6.0.0)
+      sassc-rails (~> 2.1, >= 2.1.1)
+    sassc (2.4.0)
+      ffi (~> 1.9)
+    sassc-rails (2.1.2)
+      railties (>= 4.0.0)
+      sassc (>= 2.0)
+      sprockets (> 3.0)
+      sprockets-rails
+      tilt
     sentry-raven (2.13.0)
       faraday (>= 0.7.6, < 1.0)
     shellany (0.0.1)
@@ -440,7 +439,7 @@ GEM
       rack (~> 2.2)
       rack-protection (= 2.1.0)
       tilt (~> 2.0)
-    sprockets (3.7.2)
+    sprockets (4.0.2)
       concurrent-ruby (~> 1.0)
       rack (> 1, < 3)
     sprockets-helpers (1.4.0)
@@ -536,7 +535,7 @@ DEPENDENCIES
   rubocop (= 0.52.1)
   rubocop-rspec (= 1.22.2)
   rufus-scheduler (= 3.4.2)
-  sass-rails (~> 5.0.0)
+  sass-rails (~> 6.0.0)
   sentry-raven (~> 2.0)
   shoulda
   simplecov