[ci] add ci workflow

.github/workflows/ci.yml

@@ -0,0 +1,21 @@
+name: Client Tests
+
+on: [pull_request]
+
+jobs:
+  test:
+    runs-on: ubuntu-18.04
+    steps:
+      - uses: actions/checkout@v1
+      - name: Set up Python 3.7
+        uses: actions/setup-python@v1
+        with:
+          python-version: 3.7
+      - name: Install dependencies and test
+        env:
+          working-directory: cpcbccr-python-client
+        run: |
+          python -m pip install --upgrade pip
+          python setup.py install
+          pip install pytest
+          pytest tests/*