【报Bug】uni.connectSocket() 返回的 SocketTask 的onMessage 无法绑定

分类：uni-app

let socket = uni.connectSocket({
url: wsUrl
});

socket.onMessage(function(res){
console.log('收到服务器内容：' + res.data);
});

H5 H5+都有问题
bug信息：
catch TypeError: wsSocket.onMessage is not a function
at Object.createWebSocket (VM45 pages-index-index.js:37)
at VueComponent.onLoad (VM45 pages-index-index.js:380)
at a (VM38 index.js:12067)
at s (VM38 index.js:12067)
at VueComponent.created (VM38 index.js:12067)
at callHook (VM38 index.js:18202)
at VueComponent.Vue._init (VM38 index.js:19933)
at new VueComponent (VM38 index.js:20099)
at createComponentInstanceForVnode (VM38 index.js:19606)
at init (VM38 index.js:19433)