CI/TST: Use editable install for ease of test coverage

.github/workflows/tests.yml

@@ -64,12 +64,13 @@ jobs:
     - name: Install pymsis
       run: |
         python -m pip install --upgrade pip
-        python -m pip install -v .[test]
+        python -m pip install meson-python ninja numpy setuptools_scm
+        # Need to install the package in editable mode for coverage
+        python -m pip install -v --no-build-isolation -e .[test]
 
     - name: Test with pytest
       run: |
-        # TODO: Get coverage for other modules without specifying pymsis.msis directly
-        pytest --color=yes --cov=pymsis.msis --cov pymsis.utils --cov-report=xml --pyargs pymsis
+        pytest --color=yes --cov --cov-report=xml
 
     - name: Upload code coverage
       uses: codecov/codecov-action@v5