Add wasm stub

Author: rossta

lib/rails-wasm/rails-wasm-shim/stubs/rails-html-sanitizer.rb

@@ -4,6 +4,8 @@ class Sanitizer
       def sanitize(html, ...) = html
 
       def sanitize_css(style) = style
+
+      def self.full_sanitizer = self
     end
   end
 end