add .to_s to boolean data attributes

Author: lsouoliveira

lib/ruby_ui/sidebar/sidebar_menu_button.rb

@@ -41,7 +41,7 @@ def default_attrs
         data: {
           sidebar: "menu-button",
           size: @size,
-          active: @active
+          active: @active.to_s
         }
       }
     end

lib/ruby_ui/sidebar/sidebar_menu_sub_button.rb

@@ -42,7 +42,7 @@ def default_attrs
         data: {
           sidebar: "menu-sub-button",
           size: @size,
-          active: @active
+          active: @active.to_s
         }
       }
     end