Support Webpack 5

[daniluk4000]

What problem does this feature solve?

I didn't find any existing issues for Webpack 5. I'm a little wondered if Vue CLI will support it (as it doesn't as I can see). It has released like 16 days ago, but I want to ask about any deadline for this feature.

Thanks!

What does the proposed API look like?

Webpack 5 is supported

[haoqunjiang]

See #5611 (comment)

[daniluk4000]

See #5611 (comment)

Thanks!