bubbles.gemspec in bubbles-rest-client-0.4.1 vs bubbles.gemspec in bubbles-rest-client-0.5.0

@@ -38,8 +38,9 @@
   spec.add_development_dependency "minitest-reporters", "~> 1.1"
   spec.add_development_dependency "simplecov", "~> 0.16"
   spec.add_development_dependency "webmock", "~> 3.5"
   spec.add_development_dependency "vcr", "~> 3.0"
   spec.add_development_dependency "rspec", "~> 3.8"
+  spec.add_development_dependency "os"
   spec.add_dependency "addressable", "~> 2.5"
   spec.add_dependency "rest-client", "~> 2.0"
-end
\ No newline at end of file
+end