Fix the problem that shadowdom cannot be supported and cannot be packaged

[yangdan8]

修复无法支持shadowdom以及无法打包的问题
Fix the problem that shadowdom cannot be supported and cannot be packaged

[SergioCrisostomo]

Dear @yangdan8,
my friend and creator of this repo passed away.
If you want please submit this to https://github.com/SergioCrisostomo/v-click-outside-x, I can help maintain this project he started.

[SergioCrisostomo]

Hi @yangdan8,
I have now access to publish this package in NPM under https://github.com/SergioCrisostomo/v-click-outside-x
Please send a PR there if this fix is important.

Regards