hookapp.gemspec in hookapp-2.0.8 vs hookapp.gemspec in hookapp-2.0.9

@@ -18,6 +18,7 @@
   s.executables << 'hook'
   s.add_development_dependency('aruba', '~> 0.14.14')
   s.add_development_dependency('rake', '~> 13.0.1')
   s.add_development_dependency('rdoc', '~> 6.3.2')
   s.add_runtime_dependency('gli', '~> 2.20.1')
+  s.add_runtime_dependency('tty-which', '~> 0.5', '>= 0.5.0')
 end