Release 0.20.4

A patch release, some of the accelerator datetime behaviour on latest Python.

• Fixed:

  • Solved an issue in datetime operations occuring on Python 3.13.

• Changed:

  • Dropped support for Python 3.9.

What's Changed

• Fix datetime errors in latest Python by @fsoubelet in #479

Full Changelog: 0.20.3...0.20.4