Support Python 3.12 only

[dominiquesydow]

Description

So far, this package ran on Python>=3.8, the CI tested 3.8, 3.9, and 3.10.

Python 3.8 to 3.11 only receives security support anymore, the current latest version is 3.12:
https://devguide.python.org/versions/

Since this package is pretty much standalone to visualize dynophore data, I am aiming to move straight to 3.12.

Todos

• Update setup.py Python version from >=3.8 to >=3.12
• Update versioneer.py so that it is compatible with Python 3.12
• Update CI Python version to 3.12 (drop support for 3.8, 3.9, and 3.10)
• Migrate deprecated matplotlib seaborn style from seaborn to seaborn-v0_8, fixes Can't run dynoviz (OSError: 'seaborn' is not a valid package style) #65
• Fix black and flake8 issues due to Python update
• Drop support for black-nb and flake8-nb to lower maintenance burden of this repo

Status

• Ready to go

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 53.33333% with 7 lines in your changes are missing coverage. Please review.

Project coverage is 88.83%. Comparing base (8a64fd7) to head (095c94a).

❗ Current head 095c94a differs from pull request most recent head 52b57b8. Consider uploading reports for the commit 52b57b8 to get more accurate results

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Additional details and impacted files