install in develop mode for coverage

Author: orbeckst

.github/workflows/ci.yaml

@@ -106,14 +106,15 @@ jobs:
 
     - name: Install package (with no dependencies)
       run: |
-        python -m pip install --no-deps .
+        python -m pip install --no-deps -e .
 
     - name: Run tests
       run: >-
         pytest -v
         --disable-pytest-warnings
         --durations=20
         --low-performance
+        --cov-config=pyproject.toml
         --cov="./gromacs"
         --cov-report=xml
         --cov-report=term