quote python version numbers.

move to ruff as linter

.github/workflows/python-package.yml

@@ -34,14 +34,12 @@ jobs:
           sudo apt-get install libsndfile1
           sudo apt-get install ffmpeg
           python -m pip install --upgrade pip setuptools wheel
-          pip install flake8 pytest
+          pip install ruff pytest
           pip install .[testing]
-      - name: Lint with flake8
+      - name: Lint with ruff
         run: |
-          # stop the build if there are Python syntax errors or undefined names
-          flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
-          # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
-          flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
+          ruff check tempocnn test
+          ruff format --check tempocnn test
       - name: Test with pytest
         run: |
           coverage run --source ./tempocnn -m pytest --verbose --junitxml=pytest_report${{ matrix.python-version }}.xml