Update python-matrix_common to version 1.3.0 / rev 5 via SR 1272197
https://build.opensuse.org/request/show/1272197
by user darix + anag_factory
Forwarded request #1272196 from darix
- add attrs to the build requires since it was dropped from the
package where it was pulled in in the past
- Update to 1.3.0