Errors when re-exporting bevy in a different crate

## Bevy 0.17.3

## Tried re-exporting bevy in a different crate

I re-exported bevy in my own "game_core" crate like so:
`pub extern crate bevy;`

## What went wrong

when I tried using the re-exported bevy in other crates it threw errors saying it couldn't resolve bevy sub crates
`failed to resolve: use of unresolved module or unlinked crate 'bevy_ecs'`

usage example:
```
use game_core::bevy::prelude::*;

#[derive(Component, Default, Debug, Reflect)]
#[reflect(Component, Default)]
pub struct CanPush;
```