test

[freezboi]

Version

@nuxtjs/storybook: v2.1.0
nuxt: v2.14.0

Reproduction Link

https://github.com/freezboi/nuxt-ts-vuetify-storybook-test

Steps to reproduce

1. Using create-nuxt-app

yarn create nuxt-app <project-name>
typescript selected
Vuetify.js selected

2. Install Storybook Module + addons

yarn add --dev @nuxtjs/storybook
yarn add --dev @storybook/addon-knobs
yarn add --dev @storybook/addon-docs
yarn add --dev @storybook/addon-storysource
```

### What is Expected?
addon docs page should display properly.
When first run, the page is displayed properly, but if you click the Canvas tab and then the Docs tab again, an error occurs.

### What is actually happening?
<img width="1202" alt="스크린샷 2020-08-30 오후 9 20 01" src="https://user-images.githubusercontent.com/20037780/91658973-924c6500-eb07-11ea-8aee-3cbc1a9d0d3c.png">