Update python-package.yml

Author: sverchkov

.github/workflows/python-package.yml

@@ -42,7 +42,7 @@ jobs:
       run: |
         python -m pip install --upgrade pip
         python -m pip install flake8 pytest
-        python -m pip install ${{ requirements-cmd }}
+        python -m pip install ${{ matrix.requirements-cmd }}
     - name: Lint with flake8
       run: |
         # stop the build if there are Python syntax errors or undefined names
@@ -51,4 +51,4 @@ jobs:
         flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
     - name: Test with pytest
       run: |
-        ${{ pytest-run-cmd }}
+        ${{ matrix.pytest-run-cmd }}