Update podspec to latest version

Author: ShawnMoore

XMLParsing.podspec

@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name         = "XMLParsing"
-  s.version      = "0.0.2"
+  s.version      = "0.0.3"
   s.summary      = "XMLEncoder & XMLDecoder using the Codable protocol in Swift 4"
   s.description  = "XMLParsing allows Swift 4 Codable-conforming objects to be translated to and from XML"
   s.homepage     = "https://github.com/ShawnMoore/XMLParsing"