added bytecheck?/uuid to uuid_std (rkyv#379)

* added uuid_validation feature

* PR feedback

rkyv/Cargo.toml

@@ -32,11 +32,11 @@ indexmap = { version = "1.7", optional = true, default-features = false }
 smallvec = { version = "1.7", optional = true, default-features = false }
 arrayvec = { version = "0.7", optional = true, default-features = false }
 tinyvec = { version = "1.5", optional = true, default-features = false }
-uuid = { version = "1.0", optional = true, default-features = false }
+uuid = { version = "1.3", optional = true, default-features = false }
 
 [features]
 default = ["size_32", "std"]
-alloc = ["hashbrown"]
+alloc = ["hashbrown", "bitvec?/alloc", "tinyvec?/alloc"]
 arbitrary_enum_discriminant = ["rkyv_derive/arbitrary_enum_discriminant"]
 archive_be = ["rend", "rkyv_derive/archive_be"]
 archive_le = ["rend", "rkyv_derive/archive_le"]
@@ -45,13 +45,10 @@ copy_unsafe = []
 size_16 = []
 size_32 = []
 size_64 = []
-std = ["alloc", "bytecheck/std", "ptr_meta/std", "rend/std"]
+std = ["alloc", "bytecheck?/std", "ptr_meta/std", "rend?/std", "uuid?/std"]
 strict = ["rkyv_derive/strict"]
+uuid = ["dep:uuid", "bytecheck?/uuid"]
 validation = ["alloc", "bytecheck", "rend/validation"]
 
-bitvec_alloc = ["bitvec/alloc"]
-tinyvec_alloc = ["tinyvec/alloc"]
-uuid_std = ["uuid/std"]
-
 [package.metadata.docs.rs]
 features = ["validation"]