Update sshkit requirement from ~> 1.23.2 to >= 1.23.2, < 1.25.0 (#14)

Updates the requirements on [sshkit](https://github.com/capistrano/sshkit) to permit the latest version.

Updates `sshkit` to 1.24.0
- [Release notes](https://github.com/capistrano/sshkit/releases)
- [Commits](capistrano/sshkit@v1.23.2...v1.24.0)

---
updated-dependencies:
- dependency-name: sshkit
  dependency-type: direct:production
  dependency-group: bundler
...

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Author: dependabot[bot]

supervisor.gemspec

@@ -34,7 +34,7 @@ Gem::Specification.new do |spec|
   spec.add_dependency 'hashie', '~> 5.0'
   spec.add_dependency 'httparty', '~> 0.22'
   spec.add_dependency 'pastel', '~> 0.8.0'
-  spec.add_dependency 'sshkit', '~> 1.23.2'
+  spec.add_dependency 'sshkit', '>= 1.23.2', '< 1.25.0'
   spec.add_dependency 'tty-pager', '~> 0.14.0'
   spec.add_dependency 'tty-screen', '~> 0.8.2'
   spec.add_dependency 'tty-table', '~> 0.12.0'