MOD: bump version to 2.0.2

Change-Id: I0f6802dd520bdd4d17d75a94fcfa39fcf58fa859

Author: ll128

YTKNetwork.podspec

@@ -1,7 +1,7 @@
 Pod::Spec.new do |s|
 
   s.name         = "YTKNetwork"
-  s.version      = "2.0.1"
+  s.version      = "2.0.2"
   s.summary      = "YTKNetwork is a high level request util based on AFNetworking."
   s.homepage     = "https://github.com/yuantiku/YTKNetwork"
   s.license      = "MIT"