Drop support for Python 3.8.

[overcat]

Is your feature request related to a problem? Please describe.
Python 3.8 is no longer maintained: https://endoflife.date/python
Describe the solution you'd like
Drop support for Python 3.8.
Describe alternatives you've considered
N/A
Additional context
N/A

[tupui]

Happy to do this if you want.

While I am there, do you have an opinion about updating the tooling? I am thinking about Ruff and UV.

If not for UV, can we at least remove the upper pins in Poetry for the deps? Besides the Python one, this can be an issue for downstream libraries relying on this library.

[overcat]

Let's do this when we release the next major version.

While I am there, do you have an opinion about updating the tooling? I am thinking about Ruff and UV.

As for uv, I intend to migrate to it, but currently dependabot doesn't seem to support it, so I'll wait a bit longer.

If not for UV, can we at least remove the upper pins in Poetry for the deps? Besides the Python one, this can be an issue for downstream libraries relying on this library.

Great suggestion.