Update testing workflow

.github/workflows/python-testing.yml

@@ -0,0 +1,27 @@
+name: Lint-and-test
+
+on: [push]
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: psf/black@stable
+      - uses: chartboost/ruff-action@v1
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v4
+        with:
+          python-version: 3.8
+          cache: 'pip' # caching pip dependencies
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install -r requirements.txt
+          pip install -e .
+      - name: Run tests
+        run: |
+          python -m pytest --import-mode=append tests/