fix bug in running coverage

Author: petercorke

.github/workflows/main.yml

@@ -54,24 +54,22 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v2
-    - name: Set up Python 3.7
+    - name: Set up Python 3.8
       uses: actions/setup-python@v1
       with:
-        python-version: 3.7
+        python-version: 3.8
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
         pip install .[dev]
-        pip install pytest-xvfb
-        pip install pytest-timeout
         # install the data package
         cd mvtb-data
         python -m pip install .
     - name: Run coverage
       run: |
         coverage run --omit='tests/*.py,tests/base/*.py' -m pytest
         coverage report
-        coverage xml 
+        coverage xml -i
     - name: upload coverage to Codecov
       uses: codecov/codecov-action@v3
       with: