fix: 模板绑定空对象编译到微信小程序报错的问题

packages/uni-template-compiler/lib/util.js

@@ -183,7 +183,7 @@ const tags = require('@dcloudio/uni-cli-shared/lib/tags')
 
 const {
   isBuiltInComponent
-} = require('@dcloudio/uni-cli-shared/lib/pages')
+} = require('@dcloudio/uni-cli-shared/lib/pages')
 
 const {
   getTagName
@@ -223,7 +223,7 @@ function makeMap (str, expectsLowerCase) {
  * @param {*} node
  */
 function isSimpleObjectExpression (node) {
-  return t.isObjectExpression(node) && !node.properties.find(({
+  return t.isObjectExpression(node) && node.properties.length && !node.properties.find(({
     key,
     value
   }) => !t.isIdentifier(key) || !(t.isIdentifier(value) || t.isStringLiteral(value) || t.isBooleanLiteral(value) ||
@@ -261,4 +261,4 @@ module.exports = {
   processMemberExpression,
   getForIndexIdentifier,
   isSimpleObjectExpression
-}
+}