2.15.3
tests: Adapt to pygobject 3.55.0
Add tests for new ModulemdBuildopts arches attribute
Tests: Decrease number of license identifiers
Reformat python code with black
tests: Replace assertRaisesRegexp() with assertRaisesRegex()
tests: Adapt to glib 2.87.0
Code auto-formatting
Add modulemd-obsoletes to modulemd-module
Add support for stripping XMD from an Index
Lessen quoting for git commit IDs
tests: Fix and execute Obsoletes Python tests