fix: 修改workflow配置文件

.github/workflows/python-tests.yml

@@ -0,0 +1,18 @@
+name: Python application test
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+jobs:
+  build:
+    runs-on: "ubuntu-latest"
+
+    steps:
+      - uses: actions/checkout@v2
+      - name: Install dependencies
+        run: pip install -r requirements.txt -i https://pypi.tuna.tsinghua.edu.cn/simple
+      - name: Run tests
+        run: python -m unittest discover -s tests