Remove upper limit on python version (#408)

* Remove upper limit on python version

---------

Co-authored-by: Ted Ralphs <[email protected]>

Author: DominikPeters

.github/workflows/github-ci.yml

@@ -39,7 +39,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12", "pypy3.9-v7.3.15"]
+        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12", "3.13", "pypy3.9-v7.3.15"]
         os: [macos-11, macos-12, ubuntu-20.04, ubuntu-22.04, windows-2019, windows-2022]
         exclude:
           # temporarily exclude pypy3 on mac-os as there failing tests caused by bug on cbc side

README.md

@@ -61,7 +61,7 @@ https://python-mip.readthedocs.io/_/downloads/en/latest/pdf/
 
 Questions, suggestions and feature request can be posted at [Discussions](https://github.com/coin-or/python-mip/discussions).
 
-## Build status
+## Build status 
 
 [![CI](https://github.com/coin-or/python-mip/actions/workflows/github-ci.yml/badge.svg)](https://github.com/coin-or/python-mip/actions/workflows/github-ci.yml)
 [![Current version](https://badge.fury.io/gh/coin-or%2Fpython-mip.svg)](https://github.com/coin-or/python-mip/releases)

pyproject.toml

@@ -6,7 +6,7 @@ build-backend = "setuptools.build_meta"
 name = "mip"
 description = "Python tools for Modeling and Solving Mixed-Integer Linear Programs (MIPs)"
 readme = "README.md"
-requires-python = ">=3.7,<3.13"
+requires-python = ">=3.7"
 license = {file = "LICENSE"}
 authors = [
     {name="Tulio A.M. Toffolo", email="[email protected]"},