Update old CI images (#675)

* Remove old images

* Remove comment to make sure this does not cause weird actions behavior

* Add manual Python checkout for macos runners, which switched to Python 3.14.

* Python 3.14 still used by previous fix, testing different package installation

* Add pytest-cov, which may have been missing.

* Removed commented old code

Author: mdenker

.github/workflows/CI.yml

@@ -134,7 +134,7 @@ jobs:
       fail-fast: false
       matrix:
         # OS [ubuntu-latest, macos-latest, windows-latest]
-        os: [macos-13,macos-14]
+        os: [macos-14,macos-15]
         python-version: [3.12]
     steps:
       - name: Get current year-month
@@ -143,6 +143,17 @@ jobs:
 
       - uses: actions/[email protected]
 
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/[email protected]
+        with:
+          python-version: ${{ matrix.python-version }}
+          check-latest: true
+          cache: 'pip'
+          cache-dependency-path: |
+            **/requirements.txt
+            **/requirements-extras.txt
+            **/requirements-tests.txt
+
       - name: Get current hash (SHA) of the elephant_data repo
         id: elephant-data
         run: |
@@ -157,11 +168,11 @@ jobs:
           restore-keys: datasets-      
 
       - name: Install dependencies
-        shell: bash -l {0}
         run: |
           python --version
-          pip install -e .[extras,tests]
+          python -m pip install --upgrade pip
           pip install pytest-cov coveralls
+          pip install -e .[extras,tests]
 
       - name: List packages
         shell: bash -l {0}

.github/workflows/build_wheels.yml

@@ -15,7 +15,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-20.04, windows-2019]
+        os: [ubuntu-latest, windows-latest]
 
     steps:
       - uses: actions/checkout@v4