[Bug Report] Lodash 4.17.21 以下版本含有高危漏洞

### Element UI version
2.15.13

### OS/Browsers version
Windows 10 / Chrome

### Vue version
2.7.14

### Reproduction Link
https://jsfiddle.net/

### Steps to reproduce
请点击以下链接查看：

https://nvd.nist.gov/vuln/detail/CVE-2021-23337

https://nvd.nist.gov/vuln/detail/CVE-2020-8203

https://nvd.nist.gov/vuln/detail/CVE-2020-28500

### What is Expected?
希望升级lodash版本到4.17.21，修复高危漏洞

### What is actually happening?
项目引用的lodash版本较低，有高危漏洞