Bump bootsnap from 1.5.1 to 1.6.0 (#538)

Bumps [bootsnap](https://github.com/Shopify/bootsnap) from 1.5.1 to 1.6.0.
- [Release notes](https://github.com/Shopify/bootsnap/releases)
- [Changelog](https://github.com/Shopify/bootsnap/blob/master/CHANGELOG.md)
- [Commits](rails/bootsnap@v1.5.1...v1.6.0)

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

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

Author: dependabot-preview[bot]

Gemfile.lock

@@ -82,7 +82,7 @@ GEM
     bindex (0.8.1)
     binding_of_caller (1.0.0)
       debug_inspector (>= 0.0.1)
-    bootsnap (1.5.1)
+    bootsnap (1.6.0)
       msgpack (~> 1.0)
     bootstrap (4.5.3)
       autoprefixer-rails (>= 9.1.0)
@@ -245,7 +245,7 @@ GEM
     mini_racer (0.3.1)
       libv8 (~> 8.4.255)
     minitest (5.14.3)
-    msgpack (1.3.3)
+    msgpack (1.4.1)
     nenv (0.3.0)
     net-scp (3.0.0)
       net-ssh (>= 2.6.5, < 7.0.0)