Bump engines/shopify_app from `5af43ef` to `b478a42`
Bump engines/shopify_app from `5af43ef` to `b478a42`

Bumps [engines/shopify_app](https://github.com/Shopify/shopify_app) from `5af43ef` to `b478a42`.
- [Release notes](https://github.com/Shopify/shopify_app/releases)
- [Commits](https://github.com/Shopify/shopify_app/compare/5af43efad6718ff24ca97afc4ee7e5029a923167...b478a4204f6dfce1cea549c222575d0ef4514f12)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
eliotsykes/real-world-rails