Not working with nested media queries

Using `postcss-extend-rule` and `postcss-nesting` together but coming across an issue where `@extend` definitions nested media queries are being stripped.

```
.foo {
color: red
}

.bar {
color: blue;

@media (min-width: 768px) {
@extend .red;
}
}
```
I would expect
```
.foo {
color: red
}

.bar {
color: blue;
}

@media (min-width: 768px) {
.bar {
color: red;
}
}
```