Hygienics issue in derive macro

[CGamesPlay]

Hello, I'm getting started on integrating rkyv into my crate and I ran into a small splinter. I have a custom Result type alias which causes errors when deriving CheckBytes. The fix is to use the fully-qualified name ::std::result::Result everywhere in the macro.

A test case could be added that includes no_implicit_prelude to detect any other hygienics issues of this sort.

[djkoloski]

Fixed by f2c4eff. I tried using no_implicit_prelude but it ended up causing more noise than signal by complaining about uses of Ok, Err, and Sized. If the opportunity comes up for a full pass on the derive macro, I'll take a look at using it then.