Bump bootsnap from 1.4.1 to 1.4.2 (#10395)

Bumps [bootsnap](https://github.com/Shopify/bootsnap) from 1.4.1 to 1.4.2.
- [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/v1.4.1...v1.4.2)

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

Gemfile.lock

@@ -99,7 +99,7 @@ GEM
       rack (>= 0.9.0)
     binding_of_caller (0.8.0)
       debug_inspector (>= 0.0.1)
-    bootsnap (1.4.1)
+    bootsnap (1.4.2)
       msgpack (~> 1.0)
     brakeman (4.5.0)
     browser (2.5.3)
@@ -346,7 +346,7 @@ GEM
     mini_mime (1.0.1)
     mini_portile2 (2.4.0)
     minitest (5.11.3)
-    msgpack (1.2.6)
+    msgpack (1.2.9)
     multi_json (1.13.1)
     multipart-post (2.0.0)
     necromancer (0.4.0)