更新版本号到2.6.6

Author: zhanq

package.json

@@ -5,7 +5,7 @@
   "main": "index.js",
   "license": "ISC",
   "author": "wicked.tc130",
-  "version": "2.6.5",
+  "version": "2.6.6",
   "repository": {
     "type": "git",
     "url": "https://github.com/jpush/jpush-react-native"