Replace unmaintained sass-rails with sassc-rails

closes #8362

Changelog.md

@@ -5,6 +5,7 @@
 * Get rid of some uses of "execute\_script" in feature specs [#8331](https://github.com/diaspora/diaspora/pull/8331)
 * Fix deprecation warnings for sidekiq 7.0 [#8359](https://github.com/diaspora/diaspora/pull/8359)
 * Remove entypo-rails dependency to prepare for rails 6 [#8361](https://github.com/diaspora/diaspora/pull/8361)
+* Remove compass-rails dependency which is not supported anymore [#8362](https://github.com/diaspora/diaspora/pull/8362)
 
 ## Bug fixes
 

Gemfile

@@ -62,7 +62,7 @@ gem "rack-cors", "1.1.1", require: "rack/cors"
 gem "autoprefixer-rails",     "10.4.7.0"
 gem "bootstrap-sass",         "3.4.1"
 gem "bootstrap-switch-rails", "3.3.3" # 3.3.4 and 3.3.5 is broken, see https://github.com/Bttstrp/bootstrap-switch/issues/691
-gem "sass-rails",             "5.0.7"
+gem "sassc-rails",            "2.1.2"
 gem "sprockets-rails",        "3.4.2"
 
 # Database

Gemfile.lock

@@ -646,14 +646,14 @@ GEM
     rubyzip (2.3.2)
     rugged (1.0.1)
     sass (3.4.25)
-    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)
     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
     sawyer (0.8.2)
       addressable (>= 2.3.5)
       faraday (> 0.8, < 2.0)
@@ -889,7 +889,7 @@ DEPENDENCIES
   rubocop-rails (= 2.9.1)
   ruby-oembed (= 0.16.1)
   rubyzip (= 2.3.2)
-  sass-rails (= 5.0.7)
+  sassc-rails (= 2.1.2)
   secure_headers (= 6.3.3)
   shoulda-matchers (= 4.5.1)
   sidekiq (= 6.4.2)