d9b55ae5c8
The <2.1 pin had been put there as dnspython 2.1 added "poetry" as a build time dep,
which pulled in a significant number of transitive dependencies, and it was also
causing issues with our appimage build.
dnspython 2.2.0 was released since, which no longer needs full poetry, only "poetry-core":
da279dec7e
related https://github.com/spesmilo/electrum/issues/7361