dither.gemspec in dither-0.0.5 vs dither.gemspec in dither-0.0.6

@@ -14,9 +14,10 @@
 
   s.rubyforge_project = "dither"
 
   s.add_development_dependency "rspec", "~> 3.2"
   s.add_development_dependency "rake", "~> 0.9.2"
+  s.add_development_dependency "coveralls"
 
   s.files         = `git ls-files`.split("\n")
   s.test_files    = `git ls-files -- {test,spec}/*`.split("\n")
   s.executables   = `git ls-files -- bin/*`.split("\n").map{ |f| File.basename(f) }
   s.require_paths = ["lib"]