Inaccurate Docs for cli-plugin-unit-mocha

[gsccheng]

Version

3.0.0-beta.6

Reproduction link

https://github.com/vuejs/vue-cli/tree/dev/packages/%40vue/cli-plugin-unit-mocha

Steps to reproduce

Go to https://github.com/vuejs/vue-cli/tree/dev/packages/%40vue/cli-plugin-unit-mocha

What is expected?

Configuration talks about Mocha configuration

What is actually happening?

Configuration refers to Jest configuration.