Synch egg Missing import

[Jeff Moon]

I have some automated chicken builds that install some select eggs, and I'm
starting to see errors when building the "synch" egg.  It complains about
the undefined module "synch-object".  I replicated this on a fresh install
of Ubuntu 20.10 with chicken 5.2.0 installed from apt, chicken-install sync
fails with the same error.
Thanks,
Jeff