fix: one too many curlys

Author: elevatebart

src/Preview.vue

@@ -126,7 +126,7 @@ export default {
           code,
           this.jsx
             ? { jsx: "__pragma__(h)", objectAssign: "__concatenate__", transforms: {asyncAwait: false} }
-            : { {transforms: {asyncAwait: false} }
+            : { transforms: { asyncAwait: false } }
         );
         style = renderedComponent.style;
         if (renderedComponent.script) {