Upgrade to new async-tungstenite

Author: joshtriplett

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "tide-websockets"
-version = "0.3.0"
+version = "0.4.0"
 authors = ["Jacob Rothstein <[email protected]>"]
 edition = "2018"
 description = "tide websockets"
@@ -12,7 +12,7 @@ keywords = ["tide", "websockets"]
 categories = ["web-programming::http-server", "web-programming"]
 
 [dependencies]
-async-tungstenite = "0.10.0"
+async-tungstenite = "0.13.1"
 sha-1 = "0.9.2"
 base64 = "0.13.0"
 tide = { version = "0.16.0", default-features = false, features = ["h1-server"] }