Icon component bind the class array, the bound class be the array subscript number

[sendya]

• I have searched the issues of this repository and believe that this is not a duplicate.

Version

1.2.1

Environment

Windwos 10，Chrome71，Vue2.5.17

Reproduction link

Steps to reproduce

Icon 组件绑定 class 数组，被绑定的 class 变为数组下标数字。绑定 class 类对象时，无异常

What is expected?

bind array class

What is actually happening?

Class bind to subscript number

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Icon 组件绑定 class 数组时，被绑定的 class 变为数组下标数字

[tangjinzhou]

1.2.3 已修复

[github-actions]

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