Bump sassc-rails from 2.0.0 to 2.1.2

Bumps [sassc-rails](https://github.com/sass/sassc-rails) from 2.0.0 to 2.1.2.
- [Release notes](https://github.com/sass/sassc-rails/releases)
- [Commits](https://github.com/sass/sassc-rails/compare/v2.0.0...v2.1.2)

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

Gemfile

@@ -1,7 +1,7 @@
 source 'https://rubygems.org'
 
 gem 'rails', '~> 5.2.4'
-gem 'sassc-rails', '~> 2.0.0'
+gem 'sassc-rails', '~> 2.1.2'
 gem 'coffee-rails', '~> 5.0.0'
 
 #gem 'json'

Gemfile.lock

@@ -87,7 +87,7 @@ GEM
       coffee-script-source
       execjs
     coffee-script-source (1.12.2)
-    concurrent-ruby (1.1.6)
+    concurrent-ruby (1.1.7)
     crass (1.0.6)
     database_cleaner (1.8.5)
     diff-lcs (1.3)
@@ -100,13 +100,13 @@ GEM
     factory_bot_rails (6.1.0)
       factory_bot (~> 6.1.0)
       railties (>= 5.0.0)
-    ffi (1.9.25)
+    ffi (1.13.1)
     font-awesome-sass (5.13.0)
       sassc (>= 1.11)
     globalid (0.4.2)
       activesupport (>= 4.2.0)
     htmlentities (4.3.4)
-    i18n (1.8.4)
+    i18n (1.8.5)
       concurrent-ruby (~> 1.0)
     jaro_winkler (1.5.4)
     jquery-rails (4.4.0)
@@ -221,10 +221,9 @@ GEM
       crass (~> 1.0.2)
       nokogiri (>= 1.8.0)
       nokogumbo (~> 2.0)
-    sassc (2.0.0)
-      ffi (~> 1.9.6)
-      rake
-    sassc-rails (2.0.0)
+    sassc (2.4.0)
+      ffi (~> 1.9)
+    sassc-rails (2.1.2)
       railties (>= 4.0.0)
       sassc (>= 2.0)
       sprockets (> 3.0)
@@ -252,7 +251,7 @@ GEM
       tilt (~> 2.0)
       yard (~> 0.9, >= 0.9.24)
     spring (2.1.0)
-    sprockets (3.7.2)
+    sprockets (4.0.2)
       concurrent-ruby (~> 1.0)
       rack (> 1, < 3)
     sprockets-rails (3.2.1)
@@ -320,7 +319,7 @@ DEPENDENCIES
   rspec-expectations
   rubocop (~> 0.89)
   sanitize (~> 5.2)
-  sassc-rails (~> 2.0.0)
+  sassc-rails (~> 2.1.2)
   selenium-webdriver (~> 3.142)
   simplecov
   solargraph