Use PEP-639 conform license reference in pyproject.yaml

- ensures that the metadata uses License-Expression and License-File
- CI: replace Python 3.13-dev with 3.13, add 3.14-dev

Author: mrbean-bremen

.github/workflows/test.yml

@@ -26,7 +26,8 @@ jobs:
           - "3.10"
           - "3.11"
           - "3.12"
-          - "3.13-dev"
+          - "3.13"
+          - "3.14-dev"
       fail-fast: false
 
     steps:

pyproject.toml

@@ -1,5 +1,5 @@
 [build-system]
-requires = ["flit_core>=3.7"]
+requires = ["flit_core>=3.11"]
 build-backend = "flit_core.buildapi"
 
 # project metadata
@@ -12,7 +12,8 @@ urls.Code = "https://github.com/sphinx-doc/sphinxcontrib-qthelp/"
 urls.Download = "https://pypi.org/project/sphinxcontrib-qthelp/"
 urls.Homepage = "https://www.sphinx-doc.org/"
 urls."Issue tracker" = "https://github.com/sphinx-doc/sphinx/issues/"
-license.text = "BSD-2-Clause"
+license = "BSD-2-Clause"
+license-files = ["LICENCE.rst"]
 requires-python = ">=3.9"
 
 # Classifiers list: https://pypi.org/classifiers/
@@ -22,7 +23,6 @@ classifiers = [
     "Environment :: Web Environment",
     "Intended Audience :: Developers",
     "Intended Audience :: Education",
-    "License :: OSI Approved :: BSD License",
     "Operating System :: OS Independent",
     "Programming Language :: Python",
     "Programming Language :: Python :: 3",