Get rid of mentions to python 3.8 in docs and classifiers

docs/contribute.md

@@ -67,9 +67,9 @@ Here are the steps to follow:
     cd scikit-decide
     ```
 
-- Set proper python version (e.g. 3.8.11) for the scikit-decide project.
+- Set proper python version (e.g. 3.12.2) for the scikit-decide project.
     ```shell
-    pyenv local 3.8.11
+    pyenv local 3.12.2
     ```
 
 - Update pip installer (the one that `pyenv` makes you use).
@@ -92,7 +92,7 @@ Here are the steps to follow:
 
       - Specify to poetry the python version to use so that it creates the appropriate virtual environment.
           ```shell
-          poetry env use 3.8.11
+          poetry env use 3.12.2
           ```
 
       - Install all dependencies as defined in `poetry.lock`, build and install the c++ library.
@@ -114,7 +114,7 @@ as it can also be installed by conda via the conda-forge channel.
 
 - Create and activate a conda environment with the proper python version for the scikit-decide project.
     ```shell
-    conda create -n test_dev_skdecide python=3.8.11
+    conda create -n test_dev_skdecide python=3.12.2
     conda activate test_dev_skdecide
     ```
 - Update pip installer

docs/install.md

@@ -73,35 +73,35 @@ export DO_SKIP_MZN_CHECK=1
 Please note however that the library is never tested without minizinc (or minizinc versions < 2.6).
 
 
-### Python 3.8+ environment
+### Python 3.9+ environment
 
-The use of a virtual environment for scikit-decide is recommended, and you will need to ensure that the environment use a Python version greater than 3.8.
+The use of a virtual environment for scikit-decide is recommended, and you will need to ensure that the environment use a Python version greater than 3.9.
 This can be achieved either by using [conda](https://docs.conda.io/en/latest/) or by using [pyenv](https://github.com/pyenv/pyenv) (or [pyenv-win](https://github.com/pyenv-win/pyenv-win) on windows)
 and [venv](https://docs.python.org/fr/3/library/venv.html) module.
 
-The following examples show how to create a virtual environment with Python version 3.8.13 with the mentioned methods.
+The following examples show how to create a virtual environment with Python version 3.9.18 with the mentioned methods.
 
 #### With conda (all platforms)
 
 ```shell
-conda create -n skdecide python=3.8.13
+conda create -n skdecide python=3.9.18
 conda activate skdecide
 ```
 
 #### With pyenv + venv (Linux/MacOS)
 
 ```shell
-pyenv install 3.8.13
-pyenv shell 3.8.13
+pyenv install 3.9.18
+pyenv shell 3.9.18
 python -m venv skdecide-venv
 source skdecide-venv/bin/activate
 ```
 
 #### With pyenv-win + venv (Windows)
 
 ```shell
-pyenv install 3.8.13
-pyenv shell 3.8.13
+pyenv install 3.9.18
+pyenv shell 3.9.18
 python -m venv skdecide-venv
 skdecide-venv\Scripts\activate
 ```

pyproject.toml

@@ -25,8 +25,6 @@ classifiers = [
     "Programming Language :: C++",
     "Programming Language :: Python",
     "Programming Language :: Python :: 3",
-    "Programming Language :: Python :: 3.7",
-    "Programming Language :: Python :: 3.8",
     "Topic :: Software Development",
     "Topic :: Scientific/Engineering",
 ]