Would it be possible to update zope.interface to version 5.x? It currently breaks the new mailman3 port
(see bug #250362)
I compiled py37-zope.interface-5.2.0 from ports by changing PORTVERSION to 5.2.0 and running `make makesum`, mailman3 is working fine since then. I haven't noticed any negative side-effects.
updated in r566464
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