Consider making <AppContainer> take children

[gaearon]

Currently it looks like this:

<AppContainer
  component={Root}
  props={{ store }} /* depending on what you want to pass */
/>

As suggested by @halt-hammerzeit in reduxjs/redux-devtools@64f58b7#commitcomment-17142917 we might want to make it accept children instead:

<AppContainer>
  <Root store={store} />
</AppContainer>

I think I’m on board with this. A pull request is welcome!

[alexisvincent]

@gaearon This can be closed now I think