MediaGoblin 0.13.0

This minor release adds support for Python 3.10 and 3.11 and drops support for
Python versions prior to 3.7. It also upgrades a number of Python dependencies
and adds a few small bug fixes and improvements.

This version has been tested on Debian Bullseye (11), Debian Bookworm (12),
Ubuntu 20.04, Ubuntu 22.04 and Fedora 39.

Upgrading:

For detailed instructions on installing or upgrading, see our "Upgrading" and
"Deploying" documentation in docs/source/..

If you have any problems, please drop in to the #mediagoblin IRC chat
<https://web.libera.chat/#mediagoblin>, report an issue on our issue
tracker <https://todo.sr.ht/~mediagoblin/mediagoblin> or drop us an email to
mediagoblin-devel@gnu.org <mailto:mediagoblin-devel@gnu.org>.

Breaking changes:

- MediaGoblin now supports a minimum of Python 3.7 due to use of f-strings
  internally and updated versions of required Python packages (Ben Sturmfels)

Changes:

- Extend left/right arrow key navigation to paginated views [trac#5627] (Olivier Mehani)
- Set videos to preload="metadata" to prevent upfront download [trac#5625] (Michael McMahon)
- Switch from random time password comparison to constant time (Andrew Dudash)
- Upgrade Celery library to enable support for Python 3.10/3.11 (Ben Sturmfels)
- Add CI builds for Ubuntu 22.04 (Python 3.10), Debian 12 Bookworm (Python 3.11)
  and Fedora 39 (Python 3.12) (Ben Sturmfels)
- Upgrade to support latest Jinja2 library (Ben Sturmfels)
- Upgrade to support latest PyLD library (Ben Sturmfels)
- Fix various ResourceWarnings and DeprecationWarnings (Ben Sturmfels)
- Switch default image resize filter to BICUBIC (Ben Sturmfels)
- Add "extras_require" entries for docs, audio, video, raw image, LDAP, and
  OpenID dependencies (Olivier Mehani)