v0.9.0

Breaking changes:

All hooks are now defined in a single variable borgmatic_hooks. The previous variables borgmatic_before_backup_command, borgmatic_after_backup_command and borgmatic_failure_command are no longer working and can be migrated to the new syntax like this:

borgmatic_hooks:
  before_backup:
  - echo "`date` - Starting backup."
  on_error:
  - echo "Error during prune/compact/create/check."

See here for all possible hooks, including database backups or health checks.

Other minor changes and bugfixes:

• Add support for RHEL9 and variants, remove CentOS8 and Debian Buster
• Support Archlinux. By @michalroxorpl (#79)
• Fix setuptools version for Debian
• Add Molecule verifiers and yamllint to ensure role installed OK