Tried upgrading again today and got this, so still an issue:

error: failed to prepare transaction (could not satisfy dependencies)
:: unable to satisfy dependency 'gnupg<2.2.25' required by icedove-extension-enigmail

Yes I'm still having this issue as well. This package breaks every time gnupg gets an update. I wonder if we could make the dependency constraint more flexible using sematic versioning, e.g. 'gnupg>=2.2,gnupg<2.3'?