1. add quickapp-pull-refresh.js mixin to handle pull down refresh in quick app H5 environment 2. add notifyNativeHost and requestQuickAppReload util methods for cross-environment communication 3. conditionally register the mixin only for H5 platform
1. add quickapp-pull-refresh.js mixin to handle pull down refresh in quick app H5 environment 2. add notifyNativeHost and requestQuickAppReload util methods for cross-environment communication 3. conditionally register the mixin only for H5 platform