Bump Python/Cython version (#268)

* cython version bump

* cython version bump

* update doc and pyproject

README.rst

@@ -16,7 +16,7 @@ For detailed instructions, see the `installation guide <https://ridepy.org/howto
 
 If you're in a hurry, here's the gist:
 
-- RidePy currently works best with Python 3.9
+- RidePy works with Python >= 3.9
 - If you are on platform other than x86-64 Linux, i.e., one that we don't offer wheels for, you will need to first set up a C++ build environment and the `Boost C++ libraries <https://www.boost.org/>`__. On Debian-like systems, this is easily accomplished with
 
 .. code-block:: bash

doc/howto/install-ridepy.rst

@@ -8,18 +8,18 @@ This section explains how to set up RidePy on your machine in various ways.
 Prerequisites
 -------------
 
-Currently, using Python 3.9 is your best option.
+RidePy needs at least Python 3.9.
 
 In addition, you should probably use a Python environment for keeping things clean. The following commands should work for Linux and macOS. On Windows, things might have to be done marginally different.
 
 We recommend using either `Anaconda <https://www.anaconda.com/>`__ (which has the added benefit of being able to handle different Python versions):
 
 .. code::
 
-    conda create -n ridepy python=3.9
+    conda create -n ridepy python=3.12
     conda activate ridepy
 
-or simply ``venv`` from the Python standard library (assuming you are already on Python 3.9, alternatively you can additionally use `pyenv <https://github.com/pyenv/pyenv>`__ for managing Python versions):
+or simply ``venv`` from the Python standard library (assuming you are already using your desired version, alternatively you can additionally use `pyenv <https://github.com/pyenv/pyenv>`__ for managing Python versions):
 
 .. code::
 

pyproject.toml

@@ -29,6 +29,9 @@ classifiers = [
     "License :: OSI Approved :: MIT License",
     "Natural Language :: English",
     "Programming Language :: Python :: 3.9",
+    "Programming Language :: Python :: 3.10",
+    "Programming Language :: Python :: 3.11",
+    "Programming Language :: Python :: 3.12",
     "Programming Language :: Cython",
     "Programming Language :: C++",
     "Operating System :: POSIX :: Linux",
@@ -44,7 +47,7 @@ dependencies = [
     "notebook",
     "jupytext",
     "matplotlib",
-    "cython==3.0a6",
+    "cython>=3",
     "loky",
     "typer",
     "pyarrow",
@@ -53,7 +56,7 @@ dependencies = [
 
 [project.optional-dependencies]
 dev = [
-    "black==24.3.0",
+    "black==24.8.0",
     "commitizen",
     "pdbpp",
     "pre-commit",
@@ -112,7 +115,7 @@ where = [
 [tool.black]
 line-length = 88
 target-version = [
-    "py39",
+    "py312",
 ]
 include = "\\.pyi?$"
 exclude = """

setup.py

@@ -35,6 +35,7 @@ def build_extensions(self):
             )
         ],
         compiler_directives={"embedsignature": True},
+        language_level=3,
     ),
     options={
         "build_ext": {