Setup Appraisal

activeadmin_quill_editor.gemspec

@@ -24,4 +24,6 @@ Gem::Specification.new do |spec|
   spec.require_paths = ['lib']
 
   spec.add_runtime_dependency 'activeadmin', '~> 2.0'
+
+  spec.add_development_dependency 'appraisal', '~> 2.4'
 end