Bump tapioca from 5a913bc to b7a5974 (#507)

* Bump tapioca from `5a913bc` to `b7a5974`

Bumps [tapioca](https://github.com/Shopify/tapioca) from `5a913bc` to `b7a5974`.
- [Release notes](https://github.com/Shopify/tapioca/releases)
- [Commits](Shopify/tapioca@5a913bc...b7a5974)

---
updated-dependencies:
- dependency-name: tapioca
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <support@github.com>

* Update RBIs [dependabot skip]

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: dependabot[bot] <dependabot[bot]@users.noreply.github.com>

Gemfile.lock

@@ -1,6 +1,6 @@
 GIT
   remote: https://github.com/Shopify/tapioca.git
-  revision: 5a913bc44e00c97fb5f0e81a27c819a899f4a1b3
+  revision: b7a597496c684704456abd9e4f7c8c628ec95a43
   specs:
     tapioca (0.11.9)
       bundler (>= 2.2.25)