Release 2.0.0b13 - beta quality, for testing only.

borgbackup 2.0.0b13 beta release - do not use this on production backup repositories.

Long changelog:
https://borgbackup.readthedocs.io/en/2.0.0b13/changes.html#version-2-0-0b13-2024-10-31

If you use pip to install this, use: pip install "borgbackup==2.0.0b13"

Docs: https://borgbackup.readthedocs.io/en/2.0.0b13/

Discussion: #8509

Notes:

• Binaries will come later.
• Only limited platform testing and binaries this time, see "vagrant" tag in issue tracker.