Don't test NumPy 2 with Python 3.8, it requires Python 3.9 or later.

Author: tshead

.github/workflows/regression-tests.yml

@@ -14,6 +14,9 @@ jobs:
       matrix:
         python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
         numpy-version: ["numpy<2.0.0", "numpy>=2.0.0"]
+        exclude:
+          - python-version: "3.8"
+            numpy-version: "numpy>=2.0.0"
 
     steps:
     - uses: actions/checkout@v3