chore(ci): remove redundant flake8 and configure ruff explicitly

.github/workflows/linters.yml

@@ -15,8 +15,6 @@ jobs:
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
-          pip install ruff flake8
+          pip install ruff
       - name: Run Ruff
         run: ruff check --output-format=github .
-      - name: Run Flake8
-        run: flake8 --max-line-length 120

pyproject.toml

@@ -17,6 +17,9 @@ classifiers = [
     "Programming Language :: Python :: 3 :: Only",
 ]
 
+[project.optional-dependencies]
+dev = ["ruff"]
+
 [project.urls]
 "Homepage" = "https://github.com/kanboard/python-api-client"
 "Bug Reports" = "https://github.com/kanboard/python-api-client/issues"
@@ -25,3 +28,9 @@ classifiers = [
 [build-system]
 requires = ["setuptools>=61.0"]
 build-backend = "setuptools.build_meta"
+
+[tool.ruff]
+line-length = 120
+
+[tool.ruff.lint]
+select = ["E", "F", "W", "I"]

tests/test_kanboard.py

@@ -20,10 +20,10 @@
 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 # THE SOFTWARE.
 
-import unittest
-from unittest import mock
 import types
+import unittest
 import warnings
+from unittest import mock
 
 import kanboard