do not use self-closing tags in .innerHTML (#866)

src/generators/dom/visitors/Element/Element.ts

@@ -252,7 +252,6 @@ export default function visitElement(
 		});
 
 		if (isVoidElementName(node.name)) return open + '>';
-		if (node.children.length === 0) return open + '/>';
 
 		return `${open}>${node.children.map(toHTML).join('')}</${node.name}>`;
 	}