[Bug Report] tree table row-key with 0 value disabled the expand ability
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- Dominant language
- Vue
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- 54k
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Description
### Element UI version
2.13.2
### OS/Browsers version
Windows 10， chrome 86/FF 81
### Vue version
2.6.11
### Reproduction Link
https://codepen.io/yinyihui/pen/dyXMPYX?editable=true%3Dhttps%3A%2F%2Felement.eleme.cn%2F
### Steps to reproduce
change treeData[0].id to 1,it is OK,but change it to 0,the expand ability will be broken.
### What is Expected?
the expand ability is OK
### What is actually happening?
the expand ability is broken
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Assessment
This issue has not been assessed yet.