chore(deps-dev): update rubocop requirement from = 1.56.1 to = 1.56.2 (#493)

Author: dependabot[bot]

appium_lib_core.gemspec

@@ -30,7 +30,7 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency 'minitest', '~> 5.0'
   spec.add_development_dependency 'minitest-reporters', '~> 1.1'
   spec.add_development_dependency 'webmock', '~> 3.19.0'
-  spec.add_development_dependency 'rubocop', '1.56.1'
+  spec.add_development_dependency 'rubocop', '1.56.2'
   spec.add_development_dependency 'appium_thor', '~> 1.0'
   spec.add_development_dependency 'parallel_tests'
   spec.add_development_dependency 'simplecov'