CHANGELOG.md in wechat-jsapi-0.1.2 vs CHANGELOG.md in wechat-jsapi-0.1.3

@@ -1,13 +1,20 @@
 # Wechat JS API Change Log 微信JS API库变更日志
 
 ## v0.1
+
 1. Signature class
 2. Ticket wrapper class
 
 ## v0.1.1
+
 1. Improved the Ruby Gem Specification to depend on [wechat-core](https://github.com/topbitdu/wechat-core) v0.4
 2. Improved the Signature class for the argument validation
-3. Improve the Ticket wrapper class for the argument validation & HTTP request
+3. Improved the Ticket wrapper class for the argument validation & HTTP request
 
 ## v0.1.2
-1. Improve the Ticket wrapper class for the HTTP request
+
+1. Improved the Ticket wrapper class for the HTTP request
+
+## v0.1.3
+
+1. Signature spec