added github action

.github/workflows/ci.yml

@@ -0,0 +1,17 @@
+name: CI
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  test-miex:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - run: python3 --version
+      - run: pip3 --version  # for debugging
+      - run: pip3 install -r requirements.txt
+      - run: python3 -m pytest --verbosity=2