add python version matrix for tests

Author: standag

.github/workflows/build.yml

@@ -11,13 +11,16 @@ on:
 jobs:
   test:
     runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: ['3.9', '3.10', '3.11', '3.12', '3.13']
     steps:
       - uses: actions/checkout@v4
 
-      - name: Set up Python
+      - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v5
         with:
-          python-version: '3.9'
+          python-version: ${{ matrix.python-version }}
 
       - name: Install uv
         uses: astral-sh/setup-uv@v4

pyproject.toml

@@ -9,9 +9,14 @@ description = "A library for handling BinaryCIF files."
 readme = "README.md"
 license = "MIT"
 license-files = ["LICENSE"]
-requires-python = ">=3.9"
+requires-python = ">=3.9,<3.14"
 classifiers = [
     "Programming Language :: Python :: 3",
+    "Programming Language :: Python :: 3.9",
+    "Programming Language :: Python :: 3.10",
+    "Programming Language :: Python :: 3.11",
+    "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3.13",
     "Operating System :: OS Independent",
 ]
 dependencies = [