modernize licence, set python >3.10, allow 3.13 and 3.14 in CI

Author: dimpase

.github/workflows/main.yml

@@ -17,7 +17,7 @@ jobs:
             fail-fast: false
             matrix:
                 os: [ubuntu-latest, macos-latest, windows-latest]
-                python-version: ['3.8', '3.9', '3.10', '3.11', '3.12', '3.13-dev']
+                python-version: ['3.12', '3.13', '3.14']
                 architecture: [x64, x86]
                 exclude:
                     - os: ubuntu-latest

pyproject.toml

@@ -16,13 +16,12 @@ authors = [
 dependencies = [
     "Cython",
 ]
-requires-python = ">=3.8"
+requires-python = ">=3.11"
 readme = "README.md"
-license = {text = "GPLv3"}
+license = "GPL-3.0-or-later"
 classifiers = [
     "Development Status :: 6 - Mature",
     "Intended Audience :: Science/Research",
-    "License :: OSI Approved :: GNU General Public License v3 (GPLv3)",
     "Programming Language :: Cython",
     "Programming Language :: Python :: 3",
     "Topic :: Scientific/Engineering :: Mathematics",