Sorry I couldn't reply sooner. Had health problem and just recovered.
It's disappointing at least for us. Not that I blame you or anyone. It's just that we simply cannot let that one extension go for some reasons. And it seems like there's no way to ask @matpompili to update his extension.
My friends and I have been waiting to upgrade to Beta 8, it seems like we will be using Beta 7 for much longer than we've planned.
I knew your extension for long and it's almost 1:1 fork of @matpompili extension. I appreciate it, but we're using our own servers instead of Imgur to host or store our own images.
And I was so occupied by this extension problem so much I forgot one thing: congratulations to everybody at Flarum for releasing Beta 8! I don't know exactly how long it took, but I think it's time well spent.