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](https://github.com/rails/sass-rails/compare/v5.0.7...v6.0.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Gemfile.lock

@@ -89,7 +89,7 @@ GEM
     execjs (2.7.0)
     faraday (0.12.2)
       multipart-post (>= 1.2, < 3)
-    ffi (1.11.1)
+    ffi (1.11.3)
     ffi-compiler (1.0.1)
       ffi (>= 1.0.0)
       rake
@@ -184,9 +184,6 @@ GEM
       rake (>= 0.8.7)
       thor (>= 0.19.0, < 2.0)
     rake (13.0.1)
-    rb-fsevent (0.10.3)
-    rb-inotify (0.9.10)
-      ffi (>= 0.5.0, < 2)
     rdoc (6.0.4)
     regexp_parser (1.6.0)
     rspec-core (3.9.0)
@@ -208,17 +205,16 @@ GEM
     rspec-support (3.9.0)
     rubyzip (2.0.0)
     safe_yaml (1.0.5)
-    sass (3.5.7)
-      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 (2.2.1)
+      ffi (~> 1.9)
+    sassc-rails (2.1.2)
+      railties (>= 4.0.0)
+      sassc (>= 2.0)
+      sprockets (> 3.0)
+      sprockets-rails
+      tilt
     sdoc (1.0.0)
       rdoc (>= 5.0)
     selenium-webdriver (3.142.7)
@@ -229,7 +225,7 @@ GEM
     simple_form (4.1.0)
       actionpack (>= 5.0)
       activemodel (>= 5.0)
-    sprockets (3.7.2)
+    sprockets (4.0.0)
       concurrent-ruby (~> 1.0)
       rack (> 1, < 3)
     sprockets-rails (3.2.1)
@@ -238,7 +234,7 @@ GEM
       sprockets (>= 3.0.0)
     thor (1.0.1)
     thread_safe (0.3.6)
-    tilt (2.0.8)
+    tilt (2.0.10)
     tzinfo (1.2.6)
       thread_safe (~> 0.1)
     uglifier (4.1.20)