3.0.0Beta1 The use method has changed, please explain in the document

[umbrella22]

3.0.0Beta1 The use method has changed, please explain in the document

Is your feature request related to a problem? Please describe.

In version 3.0.0, the use method is changed from the original direct introduction of components to the need to import Vue instances for installation. However, this is not stated in the document

Describe the solution you'd like

There are installation instructions for 3.0.0 in the document. I can do it for you, with your permission