Restore mypy checks

Author: Gold856

.github/workflows/python.yml

@@ -42,14 +42,12 @@ jobs:
             pip install --no-cache-dir dist/*.whl
             pytest
 
-      # Disable due to robotpy issue. See
-      # https://github.com/PhotonVision/photonvision/issues/1968
-      # - name: Run mypy type checking
-      #   uses: liskin/gh-problem-matcher-wrap@v3
-      #   with:
-      #     linters: mypy
-      #     run: |
-      #       mypy --show-column-numbers --config-file photon-lib/py/pyproject.toml photon-lib
+      - name: Run mypy type checking
+        uses: liskin/gh-problem-matcher-wrap@v3
+        with:
+          linters: mypy
+          run: |
+            mypy --show-column-numbers --config-file photon-lib/py/pyproject.toml photon-lib
 
       - name: Upload artifacts
         uses: actions/upload-artifact@master