Obftools has been superseded by Sl-Deobf and Starplane. As such, it is no longer maintained.
A multi-purpose gradle plugin to work with obfuscated codebases, I recommend to fork this plugin as it contains a few hardcoded stuff (especially in the remapper) though otherwise it is useable for pretty much everywhere as long as the build system is primitive enough. It will not work in more complicated envs such as minecraft modding
Starloader-API probably might be an usage example for you, if you dare to use it