TST/MAINT: Try actions/checkout@v3 and setup-python@v4

v1 seems to be outdated. Try with more modern versions

Author: Kai-Striega

.github/workflows/pythonpackage.yml

@@ -13,9 +13,9 @@ jobs:
         numpy-version: ["1.20", "1.21", "1.22", "1.23"]
 
     steps:
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v3
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v1
+      uses: actions/setup-python@v4
       with:
         python-version: ${{ matrix.python-version }}
     - name: Install dependencies