Binary releases should include hush-tx for completeness

[leto]

I noticed that Hush 2.0.0 mac binary release does not contain hush-tx. It's not a huge bug, most users will never use it. But for completeness, hush-cli, hushd and hush-tx should be in our binary releases.

I don't think it's super important to regenerate all 2.0.0 binary releases, let's just make sure to do this next release @FireMartZ