Installation update for 3.12

[dominiquesydow]

The installation instructions in the README only work for <3.12.

I recommend the following two steps:

1. Get everything running on Python 3.8 or 3.9 (at least the CI tests on those, see here). Might work up until <3.12. How can you get this running? Pin the Python version here as python=3.8 after downloading the package and follow the instructions.
2. Since the now up-to-date Python version is 3.12. This involves updating the installation* and most probably the code itself as there have been quite some API updates in our dependencies. *Update the repo as described here: Support Python 3.12 only wolberlab/dynophores#66

   Update setup.py Python version from >=3.8 to >=3.12
   Update versioneer.py so that it is compatible with Python 3.12

@AndreaVolkamer can you please ping your student here?