fix(app): webview

# Conflicts:
#	packages/uni-app-plus/dist/view.umd.min.js

src/platforms/app-plus/view/components/web-view/index.vue

@@ -93,17 +93,15 @@ export default {
     }
   },
   mounted () {
-    this._onParentReady(() => {
-      this.htmlId = WEBVIEW_ID_PREFIX + this.$page.id
-      insertHTMLWebView({
-        htmlId: this.htmlId
-      })
-      updateHTMLWebView({
-        src: this.$getRealPath(this.src),
-        webviewStyles: this.webviewStyles
-      })
-      UniViewJSBridge.publishHandler(WEBVIEW_INSERTED, {}, this.$page.id)
+    this.htmlId = WEBVIEW_ID_PREFIX + this.$page.id
+    insertHTMLWebView({
+      htmlId: this.htmlId
+    })
+    updateHTMLWebView({
+      src: this.$getRealPath(this.src),
+      webviewStyles: this.webviewStyles
     })
+    UniViewJSBridge.publishHandler(WEBVIEW_INSERTED, {}, this.$page.id)
   },
   beforeDestroy () {
     removeHTMLWebView()