Add python linting in CI

.github/workflows/python_lint.yml

@@ -0,0 +1,21 @@
+name: Python Lint
+
+on:
+  push:
+  pull_request:
+
+jobs:
+  mypy:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v1
+
+      - uses: ricardochaves/[email protected]
+        with:
+          use-pylint: false
+          use-pycodestyle: true
+          use-flake8: true
+          use-black: false
+          use-mypy: true
+          use-isort: false