Class component appears not working with Vue 3.

[lmiller1990]

Class component appears not working with Vue 3.

Vue CLI basic unit test is broken out of the box.

Repro: new project w/ Vue CLI, class component + ts + testing.

[lmiller1990]

This is what we need to do https://github.com/lmiller1990/vue-class-component-sfc

I will fix it tmr.

[lmiller1990]

fixed in #299