[pr review] use better name for event target

Author: Bestra

src/file-attachment-element.ts

@@ -79,7 +79,7 @@ function onDragenter(event: DragEvent) {
     cancelable: true,
     detail: {
       dragEvent: event,
-      attachmentElement: target
+      target: target
     }
   })
   target.dispatchEvent(dragEvent)

test/test.js

@@ -131,7 +131,7 @@ describe('file-attachment', function () {
       input.dispatchEvent(dragEvent)
       const event = await listener
       assert.equal(dragEvent, event.detail.dragEvent)
-      assert.equal(fileAttachment, event.detail.attachmentElement)
+      assert.equal(fileAttachment, event.detail.target)
     })
 
     it('fires a file-attachment-dragged event on dragover', async function () {
@@ -140,7 +140,7 @@ describe('file-attachment', function () {
       input.dispatchEvent(dragEvent)
       const event = await listener
       assert.equal(dragEvent, event.detail.dragEvent)
-      assert.equal(fileAttachment, event.detail.attachmentElement)
+      assert.equal(fileAttachment, event.detail.target)
     })
   })
 })