chore: upgrade to tailwindcss v4

Author: michaelroudnitski

sn_filterable.gemspec

@@ -29,7 +29,7 @@ Gem::Specification.new do |spec|
   # Uncomment to register a new dependency of your gem
   spec.add_dependency "heroicon", "~> 1"
   spec.add_dependency "kaminari", "~> 1"
-  spec.add_dependency "tailwindcss-rails", "~> 3"
+  spec.add_dependency "tailwindcss-rails", "~> 4"
   spec.add_dependency "turbo-rails", "~> 2"
   spec.add_dependency "view_component", "~> 3"