NumPy 1.25 requires Python >= 3.9

Author: apdavison

.github/workflows/core-test.yml

@@ -29,6 +29,8 @@ jobs:
         python-version: ['3.8', '3.9', '3.10', '3.11']
         numpy-version: ['1.20.3', '1.21.6', '1.22.4', '1.23.5', '1.24.1', '1.25.1']
         exclude:
+           - python-version: '3.8'
+             numpy-version: '1.25.1'
            - python-version: '3.10'
              numpy-version: '1.20.3'
            - python-version: '3.11'