Add Github Action workflow for pytest

.github/workflows/unit_tests.yml

@@ -0,0 +1,36 @@
+name: Unit Tests
+
+on:
+  pull_request:
+    paths:
+        - airbrakes/**
+  push:
+    branches:
+      - master
+
+jobs:
+  pytest:
+    name: pytest
+    runs-on: ${{matrix.os}}
+    strategy:
+      matrix:
+        python-version: ['3.12']
+        os: [ubuntu-latest]
+      fail-fast: False
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v5
+        with:
+          python-version: ${{ matrix.python-version }}
+          cache: 'pip'
+          cache-dependency-path: '**/requirements*.txt'
+      - name: Install dependencies
+        run: |
+          python -W ignore -m pip install --upgrade pip
+          python -W ignore -m pip install .
+          python -W ignore -m pip install -r requirements.txt
+
+      - name: Test with pytest
+        run: |
+            pytest -v tests/