Run mypy as a GitHub Action (#10)

Add a GitHub action to run Mypy on each commit and PR

Author: seapagan

.github/workflows/mypy.yml

@@ -0,0 +1,20 @@
+name: Type Checking
+
+on: [push, pull_request, workflow_dispatch]
+
+jobs:
+  mypy:
+    # uncomment the line before to disable this job if needed.
+    # if: false
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Mypy
+        uses: jpetrucciani/mypy-check@master
+        with:
+          path: "."
+          mypy_flags:
+            "--install-types --non-interactive --config-file pyproject.toml
+            --ignore-missing-imports --strict"
+          requirements_file: "requirements-dev.txt"
+          python_version: "3.11"