Update python-patch-ng to version 1.18.0 / rev 2 via SR 1208852
https://build.opensuse.org/request/show/1208852
by user dirkmueller + anag+factory
- update to 1.18.0:
* Feature: Require python 3.6 as minimal version
* Fix: Fix DeprecationWarning/SyntaxWarning in regex