Update random-port requirement from = 0.5.1 to = 0.6.0

Updates the requirements on [random-port](https://github.com/yegor256/random-port) to permit the latest version.
- [Release notes](https://github.com/yegor256/random-port/releases)
- [Commits](yegor256/random-port@0.5.1...0.6.0)

---
updated-dependencies:
- dependency-name: random-port
  dependency-type: direct:development
...

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

lazylead.gemspec

@@ -87,7 +87,7 @@ tasks instead of solving technical problems."
   s.add_development_dependency "minitest-reporters", "1.6.1"
   s.add_development_dependency "net-ping", "2.0.8"
   s.add_development_dependency "rake", "13.0.6"
-  s.add_development_dependency "random-port", "0.5.1"
+  s.add_development_dependency "random-port", "0.6.0"
   s.add_development_dependency "rdoc", "6.5.0"
   s.add_development_dependency "rubocop", "1.50.2"
   s.add_development_dependency "rubocop-minitest", "0.30.0"