Asset for darwin isn't found at v0.3.9

[Shunsuke Suzuki]

Thank you for your great project.

I found there is no asset for darwin at v0.3.9.

https://github.com/benbjohnson/litestream/releases/tag/v0.3.9

On the other hand, there is an asset for darwin at v0.3.8.

In my understanding, this project supports darwin. #17

Could you publish an asset for darwin?

Thank you.

[Ben Johnson]

@suzuki-shunsuke Oops, sorry about that. I added the darwin build to the release. Thanks for catching that!

[Shunsuke Suzuki]

Thank you!