Depends on unmaintained winapi crate

[RalfJung]

The winapi crate is unmaintained. The repo is unchanged for years now and the author has not replied to pings in several years either.

walkdir currently depends on winapi via winapi-util. Would be good to migrate to the windows crate, which is the (officially maintained by Microsoft) successor to winapi.

[ChrisDenton]

I believe this is essentially a dupe of BurntSushi/winapi-util#13

[RalfJung]

Ah, I didn't realize winapi-utils is also by BurntSushi. :)

[BurntSushi]

I think the winapi-util disussion is the place to track this, since walkdir does not directly depend on winapi. It only depends on it through winapi-util.

I certainly will not be depending on windows itself. It will either be windows-sys, windows-targets or none of them.