Cannot find module 'deepmerge'

[wolfstark]

Version

3.0.0-beta.8

Reproduction link

https://codesandbox.io/s/vue

Steps to reproduce

vue create app

What is expected?

The project can be built normally

What is actually happening?

Error: Cannot find module 'deepmerge'

---

@vue/cli packjson lacks dependency 'deepmerge'