Adding grape-entity to gemspec

Author: calebwoods

grape-swagger.gemspec

@@ -48,6 +48,7 @@ Gem::Specification.new do |s|
 
     if Gem::Version.new(Gem::VERSION) >= Gem::Version.new('1.2.0') then
       s.add_runtime_dependency(%q<grape>, [">= 0.2.0"])
+      s.add_runtime_dependency(%q<grape-entity>, ["~> 0.3.0"])
       s.add_runtime_dependency(%q<kramdown>, [">= 0"])
       s.add_development_dependency(%q<shoulda>, [">= 0"])
       s.add_development_dependency(%q<rdoc>, ["~> 3.12"])