Updated python version list

- Python 3.8 reached EOL and was removed from list.
- Numpy 2.0.0 is compatible with python 3.9-3.12 (https://numpy.org/doc/stable/release/2.0.0-notes.html)
- Numpy 2.1.0 adds 3.13 to "supported" python (https://numpy.org/doc/stable/release/2.1.0-notes.html)

.github/workflows/aa-ci.yml

@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ['3.8', '3.9', '3.10', '3.11']
+        python-version: ['3.9', '3.10', '3.11', '3.12']
 
     steps:
       - uses: actions/checkout@main

.github/workflows/coverage.yml

@@ -14,10 +14,10 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@main
-      - name: Set up Python 3.9
+      - name: Set up Python
         uses: actions/setup-python@main
         with:
-          python-version: '3.9'
+          python-version: '3.12'
       - name: Install coverage
         run: pip install coverage
       - name: Install astroalign dependencies