Bump rbs from 4.0.0.dev.4 to 4.0.0.dev.5

Bumps [rbs](https://github.com/ruby/rbs) from 4.0.0.dev.4 to 4.0.0.dev.5.
- [Release notes](https://github.com/ruby/rbs/releases)
- [Changelog](https://github.com/ruby/rbs/blob/master/CHANGELOG.md)
- [Commits](ruby/rbs@v4.0.0.dev.4...v4.0.0.dev.5)

---
updated-dependencies:
- dependency-name: rbs
  dependency-version: 4.0.0.dev.5
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

Gemfile.lock

@@ -48,7 +48,7 @@ GEM
     pp (0.6.3)
       prettyprint
     prettyprint (0.2.0)
-    prism (1.7.0)
+    prism (1.8.0)
     psych (5.3.1)
       date
       stringio
@@ -58,9 +58,10 @@ GEM
     rbi (0.3.9)
       prism (~> 1.0)
       rbs (>= 3.4.4)
-    rbs (4.0.0.dev.4)
+    rbs (4.0.0.dev.5)
       logger
       prism (>= 1.3.0)
+      tsort
     rdoc (7.0.3)
       erb
       psych (>= 4.0.0)