add json validation

Change-Id: I241fca15e124d48bd10dc0b371a2b89c044a8952
Reviewed-on: https://flutter-review.googlesource.com/c/recipes/+/5140
Commit-Queue: Keyong Han <keyonghan@google.com>
Reviewed-by: Godofredo Contreras <godofredoc@google.com>
4 files changed
tree: c403945f7eb83ba92ec77911b8a11e6ef9b0a78b
  1. infra/
  2. recipe_modules/
  3. recipes/
  4. .gitignore
  5. .style.yapf
  6. OWNERS
  7. recipes.py