Fix conditional statment causing a empty file key.

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@tp/helpers",
-  "version": "2.10.1",
+  "version": "2.10.2",
   "description": "",
   "main": "closest.js",
   "scripts": {

upload-files.js

@@ -49,7 +49,7 @@ export const upload = function(superClass) {
         });
 
         for (let i = 0; i < files.length; i++) {
-          formData.append(fileKey ?? files[i].name, files[i]);
+          formData.append(fileKey ? fileKey : files[i].name, files[i]);
         }
 
         document.dispatchEvent(new CustomEvent('before-request', { detail: request, bubbles: true, composed: true }));