Add parentheses around multiple spread conditions

js/src/modal.js

@@ -552,7 +552,7 @@ class Modal {
       const _config = {
         ...Default,
         ...$(this).data(),
-        ...typeof config === 'object' && config ? config : {}
+        ...(typeof config === 'object' && config ? config : {})
       }
 
       if (!data) {