<.live_img_preview /> breaks when updated

[djcoin]

After selecting a new file to upload, on save, LiveView fails on the client side trying to mergeAttrs of the attributes returned by the live_img_preview component. It tries to merge data-phx-upload-ref, data-phx-entry-refand so on, but also a comma ","

This comma seems to be a typo in lib/phoenix_component.ex