roku_builder.gemspec in roku_builder-3.12.2 vs roku_builder.gemspec in roku_builder-3.12.4

@@ -37,6 +37,7 @@
   spec.add_development_dependency "simplecov",         "~> 0.12"
   spec.add_development_dependency "coveralls",         "~> 0.8"
   spec.add_development_dependency "yard",              "~> 0.9"
   spec.add_development_dependency "guard",             "~> 2.14"
   spec.add_development_dependency "guard-minitest",    "~> 2.4"
+  spec.add_development_dependency "m",                 "~> 1.5"
 end