update openwechatsdk

ios/fluwx.podspec

@@ -16,7 +16,7 @@ A new Flutter plugin for Wechat SDK.
   s.public_header_files = 'Classes/**/*.h'
   s.static_framework = true
   s.dependency 'Flutter'
-  s.dependency 'OpenWeChatSDK','< 1.8.3+6'
+  s.dependency 'OpenWeChatSDK','< 1.8.3+5'
   
   s.ios.deployment_target = '9.0'
 end