libmodulemd-2.10.0
Reformat python code with black
Add tests for new ModulemdBuildopts arches attribute
Rename YAML specs and move them to a common location
Correct some typographical errors.
Revise tests for easier debugging
Add modulemd-obsoletes to modulemd-module
Also restrict buildorder from modulemd-packager
Add Modulemd.UpgradeHelper object
Add modulemd-obsoletes