Release 0.8.4

This is a patch release which pins the pyjapc optional dependency to a conditional Python version.
Since its support has officially ended we limit its installation to Python < 3.12.

Only the BRST logging uses the package and users will be warned about it.

What's Changed

• Pyjapc pin and warning by @fsoubelet in #113

Full Changelog: v0.8.3...v0.8.4