Update to cfg-if 1.0

Author: mbrubeck

Cargo.toml

@@ -19,7 +19,7 @@ exclude     = [
 [dependencies]
 libc = { version = "0.2.78", features = [ "extra_traits" ] }
 bitflags = "1.1"
-cfg-if = "0.1.10"
+cfg-if = "1.0"
 
 [target.'cfg(target_os = "dragonfly")'.build-dependencies]
 cc = "1"