Move compass-rails back to 4.0

This must have been a mistake when managing initial conflicts in rails6 branch

Gemfile

@@ -98,7 +98,7 @@ gem 'whenever', require: false
 gem 'test-unit', '~> 3.4'
 
 gem 'coffee-rails', '~> 5.0.0'
-gem 'compass-rails', '~> 3.0'
+gem 'compass-rails'
 
 gem 'mini_racer', '0.4.0'
 

Gemfile.lock

@@ -192,7 +192,7 @@ GEM
       sass (>= 3.3.0, < 3.5)
     compass-import-once (1.0.5)
       sass (>= 3.2, < 3.5)
-    compass-rails (3.1.0)
+    compass-rails (4.0.0)
       compass (~> 1.0.0)
       sass-rails (< 5.1)
       sprockets (< 4.0)
@@ -474,7 +474,7 @@ GEM
       activerecord (>= 5.2.4)
       activesupport (>= 5.2.4)
       i18n
-    rb-fsevent (0.10.4)
+    rb-fsevent (0.11.0)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
     redcarpet (3.5.1)
@@ -685,7 +685,7 @@ DEPENDENCIES
   codecov
   coffee-rails (~> 5.0.0)
   combine_pdf
-  compass-rails (~> 3.0)
+  compass-rails
   custom_error_message!
   daemons
   dalli