Fix split of rkyv feature.

[n3vu0r]

Sorry, I forgot to actually test cargo check --features rkyv_64. It does not work because rkyv_64 = ["dep:rkyv", "rkyv/size_64"] treats rkyv in "rkyv/size_64" as feature instead of dependency and "dep:rkyv/size_64" is invalid. The fix is to avoid namespaced features when we have to enable a dependency of a dependency. I've tried rkyv_64 = ["dep:rkyv", "rkyv?/size_64"] as well and it first seems to work but as soon as ordered-float is used in another crate it breaks.

[mbrubeck]

rkyv_64 = ["dep:rkyv", "rkyv?/size_64"] seems to work correctly for me. What sort of failures are you seeing?

My test crate has:

[dependencies]
ordered-float = { path = "../rust-ordered-float/", features = ["rkyv_64"] }
rkyv = { version = "*", default-features = false, features = ["size_64"] }

[n3vu0r]

I tried again and indeed, no errors. Must have screwed up the cfg macro.