This is mainly for my own personal use, as I use tachiyomi on multiple devices configured to auto update through fdroid, and this way I can update all plugins on all of them just by pushing once and initiating a check. If you intend to do so as well, please use https://tachi.efreakbnc.net/fdroid/repo
This repo also contains some other open source (as well as a few closed-source) manga readers and related apps I found, downloaded directly from github (or the main website, in the case of cylonu87's apps)
If I don't update fast enough for you and you'd like to take over the work, let me know and I'll give you the config.py and the keyfile and such. The script I use to update is update-tachi.sh.