This update for librepo fixes the following issues:

- Updated librepo to version 1.13.0
* Dropped support for python2
* Fixed a memory leak
* Support was added for pkcs11 certificate and key for repository authorization
* Fixed a bug where the cpu consumption went up to 100%
* Added support when working with certificates used in combination with a proxy

This update was imported from the SUSE:SLE-15-SP2:Update update project.
This update was imported from the openSUSE:Leap:15.2:Update update project.