sysutils/py-diffoscope: Update to 144

• Remove diffoscope/comparators/zip.py patch, upstreamed
• Update Python <version-spec> to match upstream support [1]

[1] https://salsa.debian.org/reproducible-builds/diffoscope/-/issues/117

PR: 245663
Submitted by: Michael Osipov <michael dot osipov siemens com>
MFH: 2020Q2 (blanket: bugfix releases)