add automated unit testing

Author: lpm0073

.github/workflows/precommit.yml

@@ -0,0 +1,19 @@
+name: Run all tests
+
+on:
+  pull_request:
+  push:
+
+jobs:
+  tests:
+    name: tests
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout
+      - name: Set up Python 3.x
+        uses: actions/setup-python
+        with:
+          python-version: "3.10"
+      - run: python -m pip install -r requirements/local.txt
+      - run: python -m tests