(continue to attempt to) fix github workflows

.github/workflows/testing.yml

@@ -9,7 +9,7 @@ jobs:
       max-parallel: 20
       matrix:
         os: [ubuntu-latest]
-        python-version: [3.8]
+        python-version: ["3.9", "3.10", "3.11"]
 
     runs-on: ${{ matrix.os }}
 
@@ -18,9 +18,9 @@ jobs:
       MPLBACKEND: "Agg"
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v2
+      uses: actions/setup-python@v4
       with:
         python-version: ${{ matrix.python-version }}
     - name: Install dependencies
@@ -30,4 +30,10 @@ jobs:
         pip install -e .
     - name: pytest
       run: |
-        pytest --cov=pymatgen.io.validation --durations=30 pymatgen
+        pytest --cov=pymatgen --cov-report=xml
+        
+    - uses: codecov/codecov-action@v1
+      if: matrix.python-version == 3.10
+      with:
+        token: ${{ secrets.CODECOV_TOKEN }}
+        file: ./coverage.xml