build(deps): bump sprockets from 3.7.2 to 4.0.0

Bumps [sprockets](https://github.com/rails/sprockets) from 3.7.2 to 4.0.0.
- [Release notes](https://github.com/rails/sprockets/releases)
- [Changelog](https://github.com/rails/sprockets/blob/master/CHANGELOG.md)
- [Commits](rails/sprockets@v3.7.2...v4.0.0)

Signed-off-by: dependabot-preview[bot] <[email protected]>

Author: dependabot-preview[bot]

Gemfile.lock

@@ -315,7 +315,7 @@ GEM
       rack (~> 2.0)
       rack-protection (= 2.0.4)
       tilt (~> 2.0)
-    sprockets (3.7.2)
+    sprockets (4.0.0)
       concurrent-ruby (~> 1.0)
       rack (> 1, < 3)
     sprockets-rails (3.2.1)