update gh actions

Author: timvink

.github/workflows/pythonpublish.yml

@@ -12,9 +12,9 @@ jobs:
       # IMPORTANT: this permission is mandatory for trusted publishing
       id-token: write
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Set up Python
-      uses: actions/setup-python@v4
+      uses: actions/setup-python@v5
       with:
         python-version: '3.x'
     - name: Install dependencies

.github/workflows/unittests_codecov.yml

@@ -13,15 +13,15 @@ jobs:
     name: Run unit tests with codecov upload
     runs-on: ${{ matrix.os }}
     env:
-      USING_COVERAGE: '3.8'
+      USING_COVERAGE: '3.9'
     strategy:
       matrix: 
         os: [ubuntu-latest, macos-latest, windows-latest]
         python-version: [3.8, 3.9, "3.10", "3.11"]
     steps:
     - uses: actions/checkout@master
     - name: Setup Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v2
+      uses: actions/setup-python@v5
       with:
         python-version: ${{ matrix.python-version }}
     - name: Static code checking with pyflakes