Test with python 3.13 (#356)

* Test with python 3.13

* Update pyproject.toml

* Update environment.yml

* Update unittest.yml

Author: jan-janssen

.ci_support/environment.yml

@@ -8,3 +8,4 @@ dependencies:
 - jinja2 =3.1.4
 - paramiko =3.5.0
 - tqdm =4.66.6
+- setuptools =75.1.0

.github/workflows/unittest.yml

@@ -15,10 +15,13 @@ jobs:
       matrix:
         include:
           - operating-system: macos-latest
-            python-version: '3.12'
+            python-version: '3.13'
 
           - operating-system: windows-latest
-            python-version: '3.12'
+            python-version: '3.13'
+
+          - operating-system: ubuntu-latest
+            python-version: '3.13'
 
           - operating-system: ubuntu-latest
             python-version: '3.12'

pyproject.toml

@@ -11,7 +11,7 @@ authors = [
 readme = "README.md"
 license = { file = "LICENSE" }
 keywords = ["pyiron"]
-requires-python = ">=3.9, <3.13"
+requires-python = ">=3.9, <3.14"
 classifiers = [
     "Development Status :: 5 - Production/Stable",
     "Topic :: Scientific/Engineering :: Physics",
@@ -22,6 +22,7 @@ classifiers = [
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3.13",
 ]
 dependencies = [
     "jinja2==3.1.4",