What changed, after your git pull, is that lyrebird started reporting its version number to tor. The STATUS protocol that is used by pluggable transports to report their version number was recently re-specified in an incompatible way. It looks like an unanticipated bug that it would cause problems with already deployed versions of tor that interpreted STATUS messages according to the old specification. I left some comments on the bug tracker:
As a workaround, you can try removing the pt.ReportVersion calls from this commit: Report the lyrebird version to tor (f56896ff) · Commits · The Tor Project / Anti-censorship / Pluggable Transports / lyrebird · GitLab.