fix(mp-alipay): add createSelectorQuery,createIntersectionObserver

packages/vue-cli-plugin-uni/packages/mp-vue/dist/mp.runtime.esm.js

@@ -5829,9 +5829,18 @@ function internalMixin(Vue) {
 
   MP_METHODS.forEach(function (method) {
     Vue.prototype[method] = function(args) {
-      if (this.$scope) {
+      if (this.$scope && this.$scope[method]) {
         return this.$scope[method](args)
       }
+      // 主要是 mp-alipay
+      if (method === 'createSelectorQuery') {
+        /* eslint-disable no-undef */
+        return uni.createSelectorQuery(args).in(this)
+      } else if (method === 'createIntersectionObserver') {
+        /* eslint-disable no-undef */
+        return uni.createIntersectionObserver(this, args)
+      }
+      // TODO mp-alipay 暂不支持 selectAllComponents,selectComponent
     };
   });