Add jupytext to pre-commit hooks.

.pre-commit-config.yaml

@@ -5,6 +5,15 @@ repos:
       - id: check-yaml
       - id: end-of-file-fixer
       - id: trailing-whitespace
+  -   repo: https://github.com/mwouts/jupytext
+      rev: v1.14.7
+      hooks:
+        - id: jupytext
+          args: [--sync, --pipe, isort, black, flake8]
+          additional_dependencies:
+            - isort==5.12.0 # Matches hook
+            - black==22.3.0
+            - flake8==6.0.0
   - repo: https://github.com/pycqa/isort
     rev: 5.12.0
     hooks: