Add some linting and testing CI

.github/workflows/testing.yml

@@ -0,0 +1,34 @@
+# write a github action to run the tests
+
+name: Testing
+on: [push, pull_request]
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11"]
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up Python
+      uses: actions/setup-python@v2
+      with:
+        python-version: ${{ matrix.python-version }}
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        python -m pip install flake8
+        if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
+        if [ -f tests/requirements.txt ]; then pip install -r tests/requirements.txt; fi
+        python -m pip install -e .
+    - name: Lint with flake8
+      run: |
+        # stop the build if there are Python syntax errors or undefined names
+        flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
+        # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
+        flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
+    - name: Test with pytest
+      run: |
+        python -m pytest --cov=.
+        cp .coverage .coverage.${{ matrix.python-version }}