Bump to 0.1.19

Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 
 name = "num"
-version = "0.1.18"
+version = "0.1.19"
 authors = ["The Rust Project Developers"]
 license = "MIT/Apache-2.0"
 homepage = "https://github.com/rust-lang/num"