some fixes and smaller improvements (see below) have been implemented in the past months - IMO not yet enough that would qualify for a 5.1 version.
But of course you can already use them by downloading the current master from GitHub.
Also there is no contact to developers team
Josh S. is currently not actively developing Typesetter and we don't know when or if this will change again.
So, for the moment we only make slow progress.
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