Update to 1.4.5

• While I'm here, add NO_ARCH

Changes: https://github.com/msiemens/PyGitUp/blob/master/README.rst#changelog
PR: 222767
Differential Revision: https://reviews.freebsd.org/D12585
Submitted by: Le Baron d'Merde <lbdm@privacychain.ch>
Approved by: maintainer (timeout, 19 days)