Bump bootsnap from 1.9.1 to 1.9.3

Bumps [bootsnap](https://github.com/Shopify/bootsnap) from 1.9.1 to 1.9.3.
- [Release notes](https://github.com/Shopify/bootsnap/releases)
- [Changelog](https://github.com/Shopify/bootsnap/blob/master/CHANGELOG.md)
- [Commits](https://github.com/Shopify/bootsnap/compare/v1.9.1...v1.9.3)

---
updated-dependencies:
- dependency-name: bootsnap
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Gemfile.lock

@@ -61,7 +61,7 @@ GEM
       tzinfo (~> 2.0)
     ast (2.4.2)
     bindex (0.8.1)
-    bootsnap (1.9.1)
+    bootsnap (1.9.3)
       msgpack (~> 1.0)
     brakeman (5.1.2)
     builder (3.2.4)