Error after upgrading to v0.11 in Nuxt apps

[Justineo]

Here's the repro repo: https://github.com/Justineo/nuxt-vue-demi-vue-echarts-repro

I upgraded to vue-demi@0.11.2 for vue-echarts@6.0.0 and it seems to be broken in Nuxt apps with the following runtime error:

. After downgrading to vue-demi@0.10.1 it works correctly. Is there any change that may cause this issue?