introduce dartsass-rails gem

Gemfile

@@ -21,7 +21,7 @@ gem "pry-rails"
 gem "puma"
 gem "recurrence"
 gem "ruby-trello", require: "trello"
-gem "sass-rails"
+gem "dartsass-rails"
 gem "sidekiq"
 gem "strong_migrations"
 gem "turbolinks"

Gemfile.lock

@@ -100,6 +100,8 @@ GEM
     crack (0.4.5)
       rexml
     crass (1.0.6)
+    dartsass-rails (0.3.0)
+      railties (>= 6.0.0)
     diff-lcs (1.5.0)
     digest (3.1.0)
     docile (1.4.0)
@@ -362,16 +364,8 @@ GEM
     ruby_parser (3.18.1)
       sexp_processor (~> 4.16)
     rubyzip (2.3.2)
-    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
     sawyer (0.8.2)
       addressable (>= 2.3.5)
       faraday (> 0.8, < 2.0)
@@ -399,13 +393,6 @@ GEM
       rack (~> 2.2)
       rack-protection (= 2.2.0)
       tilt (~> 2.0)
-    sprockets (4.0.3)
-      concurrent-ruby (~> 1.0)
-      rack (> 1, < 3)
-    sprockets-rails (3.4.2)
-      actionpack (>= 5.2)
-      activesupport (>= 5.2)
-      sprockets (>= 3.0.0)
     strong_migrations (0.8.0)
       activerecord (>= 5.2)
     strscan (3.0.1)
@@ -461,6 +448,7 @@ DEPENDENCIES
   capybara
   capybara-screenshot
   capybara_discoball
+  dartsass-rails
   dotenv-rails
   factory_bot_rails
   font-awesome-sass
@@ -484,7 +472,6 @@ DEPENDENCIES
   rubocop-rails
   rubocop-rspec
   ruby-trello
-  sass-rails
   selenium-webdriver
   shoulda-matchers
   sidekiq