add CI test for lowest supported runtime version of numpy

.github/workflows/build.yml

@@ -110,6 +110,18 @@ jobs:
         run: |
           pytest --cov cyvcf2 --cov-report term-missing
 
+      # make sure to keep this numpy version in sync with setup.py
+      - name: Test with oldest numpy that we support
+        if: contains(fromJson('["3.7"]'), matrix.python-version)
+        run: |
+          pip install --force-reinstall --no-cache-dir 'numpy==1.16.0'
+          pytest --cov cyvcf2 --cov-report term-missing
+
+      - name: Test with newest available numpy
+        run: |
+          pip install -U numpy
+          pytest --cov cyvcf2 --cov-report term-missing
+
   windows_build:
     name: Run tests on Python windows-2022 MSYS2 UCRT64
     runs-on: windows-2022
@@ -164,6 +176,11 @@ jobs:
         run: |
           pytest --cov cyvcf2 --cov-report term-missing
 
+      - name: Test with newest available numpy
+        run: |
+          pip install -U numpy
+          pytest --cov cyvcf2 --cov-report term-missing
+
   sdist:
     runs-on: ubuntu-22.04
     strategy:
@@ -207,6 +224,11 @@ jobs:
         run: |
           pytest --import-mode importlib --cov cyvcf2 --cov-report term-missing
 
+      - name: Test with newest available numpy
+        run: |
+          pip install -U numpy
+          pytest --import-mode importlib --cov cyvcf2 --cov-report term-missing
+
       - name: Upload sdist tarball
         if: runner.os == 'Linux'
         uses: actions/upload-artifact@v4

setup.py

@@ -290,7 +290,8 @@ def run(self):
         ],
     ),
     python_requires=">=3.7",
-    install_requires=["numpy", "coloredlogs", "click"],
+    # make sure to keep this numpy version in sync with build.yml
+    install_requires=["numpy>=1.16.0", "coloredlogs", "click"],
     include_package_data=True,
     zip_safe=False,
     cmdclass={