Auto-generate code coverage report

Author: briandesilva

.github/workflows/run-tests.yml

@@ -35,12 +35,12 @@ jobs:
         pip install -r requirements-dev.txt
     - name: Test with pytest
       run: |
-        pytest tests
-    # - name: Upload coverage to Codecov
-    #   uses: codecov/codecov-action@v1
-    #   with:
-    #     token: ${{ secrets.CODECOV_TOKEN }}
-    #     file: ./coverage.xml
+        pytest tests --cov=pysensors --cov-report=xml
+    - name: Upload coverage to Codecov
+      uses: codecov/codecov-action@v1
+      with:
+        token: ${{ secrets.CODECOV_TOKEN }}
+        file: ./coverage.xml
     - name: Execute feature notebook with papermill
       run: |
         pip install papermill