Bump sass-rails from 5.0.7 to 6.0.0

Bumps [sass-rails](https://github.com/rails/sass-rails) from 5.0.7 to 6.0.0.
- [Release notes](https://github.com/rails/sass-rails/releases)
- [Commits](rails/sass-rails@v5.0.7...v6.0.0)

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

Author: dependabot-preview[bot]

Gemfile.lock

@@ -407,8 +407,8 @@ GEM
     rainbow (3.0.0)
     rake (12.3.3)
     rb-fsevent (0.10.3)
-    rb-inotify (0.9.10)
-      ffi (>= 0.5.0, < 2)
+    rb-inotify (0.10.0)
+      ffi (~> 1.0)
     record_tag_helper (1.0.0)
       actionview (~> 5.x)
     regexp_parser (1.6.0)
@@ -455,20 +455,17 @@ GEM
       crass (~> 1.0.2)
       nokogiri (>= 1.8.0)
       nokogumbo (~> 2.0)
-    sass (3.7.2)
-      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 (5.0.7)
-      railties (>= 4.0.0, < 6)
-      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 (2.0.1)
       ffi (~> 1.9)
       rake
+    sassc-rails (2.1.2)
+      railties (>= 4.0.0)
+      sassc (>= 2.0)
+      sprockets (> 3.0)
+      sprockets-rails
+      tilt
     selenium-webdriver (3.142.3)
       childprocess (>= 0.5, < 2.0)
       rubyzip (~> 1.2, >= 1.2.2)
@@ -507,7 +504,7 @@ GEM
       unicode-display_width (~> 1.1, >= 1.1.1)
     thor (0.20.3)
     thread_safe (0.3.6)
-    tilt (2.0.8)
+    tilt (2.0.9)
     traceroute (0.8.0)
       rails (>= 3.0.0)
     twitter-typeahead-rails (0.11.1)