Update workflows to test against same

python versions as matplotlib.

Author: isaacrobinson2000

.github/workflows/pytest.yml

@@ -17,7 +17,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, macos-latest]
-        python-version: ["3.7", "3.8", "3.9"]
+        python-version: ["3.9", "3.10", "3.11", "3.12"]
 
     steps:
       - uses: actions/checkout@v3