serviceworker-rails.gemspec in serviceworker-rails-0.5.4 vs serviceworker-rails.gemspec in serviceworker-rails-0.5.5

- old
+ new

@@ -27,7 +27,7 @@
   spec.add_development_dependency "minitest", "~> 5.0"
   spec.add_development_dependency "rack-test"
   spec.add_development_dependency "rubocop", "0.46.0"
   spec.add_development_dependency "rails"
   spec.add_development_dependency "appraisal", "~> 2.1.0"
-  spec.add_development_dependency "coveralls"
+  spec.add_development_dependency "simplecov"
 end