Hi there, amazing job with **vue-live**. ## Problem I have a problem where I need to use the `layoutProps` `prop` from `vue-live`. Reading the code, aparenttly there is no way how to do that using this plugin. [This line](https://github.com/vue-styleguidist/vuepress-plugin-live/blob/master/markDownPlugin.js#L51) of code passes only the lang to layoutProps. Can we add this feature? ## Proposal Add a second object to markdown langArray like [this one](https://github.com/vue-styleguidist/vuepress-plugin-live/blob/master/markDownPlugin.js#L48)