Bump to 0.19.0

Breaking change in the way Server receives clients.

Author: Michael Eden

Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 
 name = "websocket"
-version = "0.18.0"
+version = "0.19.0"
 authors = ["cyderize <admin@cyderize.org>", "Michael Eden <themichaeleden@gmail.com>"]
 
 description = "A WebSocket (RFC6455) library for Rust."