chore: update fixtures path and mailer assets

Author: rsmithlal

app/assets/config/better_together_manifest.js

@@ -4,6 +4,7 @@
 //= link_tree ../stylesheets .css
 //= link_tree ../../../vendor/stylesheets .css
 //= link_tree ../stylesheets .scss
+//= link better_together/mailer.css
 //= link_tree ../images
 
 //= link actioncable.js

app/assets/stylesheets/better_together/theme.scss

@@ -1,6 +1,6 @@
-@use "bootstrap/functions" as *;
-@use "bootstrap/mixins" as *;
-@use "bootstrap/variables" as *;
+@import "bootstrap/functions";
+@import "bootstrap/mixins";
+@import "bootstrap/variables";
 
 // Define default color variables (if not overridden by the host app)
 $text-opposite-theme-color: #333 !default;

spec/rails_helper.rb

@@ -47,7 +47,7 @@
   config.after { Warden.test_reset! }
 
   # Remove this line if you're not using ActiveRecord or ActiveRecord fixtures
-  config.fixture_path = "#{Rails.root}/spec/fixtures"
+  config.fixture_paths = [Rails.root.join('spec/fixtures')]
 
   # If you're not using ActiveRecord, or you'd prefer not to run each of your
   # examples within a transaction, remove the following line or assign false