alloc-compose 0.4.0

Composable allocator structures for plugging together more powerful allocators
Documentation
### [v0.4.0]https://github.com/TimDiekmann/alloc-compose/tree/v0.4.0

[Documentation](https://docs.rs/alloc-compose/0.4.0/alloc_compose/)

- **Breaking Change** Using unified naming scheme
- **Breaking Change** Change `CallbackRef` to listen on `before_` and `after_` events
- Greatly improve documentation of `Affix`

### [v0.3.1]https://github.com/TimDiekmann/alloc-compose/tree/v0.3.1

[Documentation](https://docs.rs/alloc-compose/0.3.1/alloc_compose/)

- Add more documentation
- Add more tests

# [v0.3]https://github.com/TimDiekmann/alloc-compose/tree/v0.3.0

[Documentation](https://docs.rs/alloc-compose/0.3.0/alloc_compose/)

- **Breaking Change** Use `const_generics` in `SegregateAlloc`
- Add `AffixAlloc`, `ChunkAlloc`, and `MemoryMarker`
- Add more tests

# [v0.2]https://github.com/TimDiekmann/alloc-compose/tree/v0.2.0

[Documentation](https://docs.rs/alloc-compose/0.2.0/alloc_compose/)

- **Breaking Change** Use `core::alloc` instead of `alloc_wg`
- Add `Region`, `CallbackRef`, `Proxy`, and `stats`
- Add more tests

# [v0.1]https://github.com/TimDiekmann/alloc-compose/tree/v0.1.0

[Documentation](https://docs.rs/alloc-compose/0.1.0/alloc_compose/)

- Initial release: `Owns`, `NullAlloc`, `FallbackAlloc`, and `SegregateAlloc`