Ported boolean attribute support.

assets/misuzu.js/utils.js

@@ -79,6 +79,11 @@ const $e = function(info, attrs, child, created) {
                     }
                     break;
 
+                case 'boolean':
+                    if(attr)
+                        elem.setAttribute(key, '');
+                    break;
+
                 default:
                     if(key === 'className')
                         key = 'class';