Updated podspec dependency.

Author: cconstable

ParseModel.podspec

@@ -13,5 +13,5 @@ Pod::Spec.new do |s|
   s.platform     = :ios, '5.0'
   s.source_files = 'ParseModel/**/*.{h,m}'
   s.requires_arc = true
-  s.dependency = 'Parse'
+  s.dependency 'Parse'
 end