According to [RFC 344][], methods that return `&[u8]` should have names ending in `bytes`. Though `include_bin!` is a macro not a method, it seems reasonable to follow the convention anyway.
We keep the old name around for now, but trigger a deprecation warning when it is used.
[RFC 344]: https://github.com/rust-lang/rfcs/blob/master/text/0344-conventions-galore.md
[breaking-change]