minibytes
This create provides the [Bytes] type. It is similar to &[u8]: cloning
or slicing are zero-copy. Unlike &[u8], Bytes does not have lifetime.
This is done by maintaining the life cycle of the underlying storage using
reference count.
Aside from supporting Vec<u8> as the underlying storage, [Bytes] also
supports [memmap2::Mmap]. Libraries can implement [BytesOwner] for other
types to further extend storage support.