🐛(input-number): 修复手动输入拼接字符串的问题

package/component/src/component/inputNumber/index.vue

@@ -113,7 +113,7 @@ const inputChange = function () {
 };
 
 const isNumber = function (num: any) {
-  return /^\d+(\.\d+)?$/.test(num);
+  return !isNaN(num)
 };
 </script>
 

package/document-component/src/document/zh-CN/components/inputNumber.md

@@ -13,6 +13,7 @@
 ::: demo 使用 `lay-input-number` 标签, 创建数字输入框
 
 <template>
+  {{data1}}
   <lay-input-number v-model="data1"></lay-input-number>
   <lay-input-number v-model="data2"  position="right"></lay-input-number>
 </template>