Bump listen from 3.8.0 to 3.9.0

Bumps [listen](https://github.com/guard/listen) from 3.8.0 to 3.9.0.
- [Release notes](https://github.com/guard/listen/releases)
- [Commits](guard/listen@v3.8.0...v3.9.0)

---
updated-dependencies:
- dependency-name: listen
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Gemfile.lock

@@ -220,7 +220,7 @@ GEM
     launchy (2.5.2)
       addressable (~> 2.8)
     link_header (0.0.8)
-    listen (3.8.0)
+    listen (3.9.0)
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)
     logstasher (2.1.5)