Update podspec

Author: LukeTangPL

SwiftyJSON.podspec

@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name        = "SwiftyJSON"
-  s.version     = "2.1.3"
+  s.version     = "2.2.0"
   s.summary     = "SwiftyJSON makes it easy to deal with JSON data in Swift"
   s.homepage    = "https://github.com/SwiftyJSON/SwiftyJSON"
   s.license     = { :type => "MIT" }
@@ -9,6 +9,6 @@ Pod::Spec.new do |s|
   s.requires_arc = true
   s.osx.deployment_target = "10.9"
   s.ios.deployment_target = "8.0"
-  s.source   = { :git => "https://github.com/SwiftyJSON/SwiftyJSON.git", :tag => "2.1.3"}
+  s.source   = { :git => "https://github.com/SwiftyJSON/SwiftyJSON.git", :tag => "2.2.0"}
   s.source_files = "Source/*.swift"
 end