Bump split from 4.0.1 to 4.0.2

Bumps [split](https://github.com/splitrb/split) from 4.0.1 to 4.0.2.
- [Release notes](https://github.com/splitrb/split/releases)
- [Changelog](https://github.com/splitrb/split/blob/main/CHANGELOG.md)
- [Commits](splitrb/split@v4.0.1...v4.0.2)

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

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

Author: dependabot[bot]

Gemfile.lock

@@ -1,20 +1,24 @@
 GEM
   remote: http://rubygems.org/
   specs:
+    connection_pool (2.3.0)
     mustermann (3.0.0)
       ruby2_keywords (~> 0.0.1)
     rack (2.2.4)
     rack-protection (3.0.4)
       rack
-    redis (4.5.1)
+    redis (5.0.5)
+      redis-client (>= 0.9.0)
+    redis-client (0.11.2)
+      connection_pool
     ruby2_keywords (0.0.5)
     rubystats (0.3.0)
     sinatra (3.0.4)
       mustermann (~> 3.0)
       rack (~> 2.2, >= 2.2.4)
       rack-protection (= 3.0.4)
       tilt (~> 2.0)
-    split (4.0.1)
+    split (4.0.2)
       redis (>= 4.2)
       rubystats (>= 0.3.0)
       sinatra (>= 1.2.6)