Bump tokio-tungstenite from 0.11.0 to 0.12.0

Bumps [tokio-tungstenite](https://github.com/snapview/tokio-tungstenite) from 0.11.0 to 0.12.0.
- [Release notes](https://github.com/snapview/tokio-tungstenite/releases)
- [Commits](https://github.com/snapview/tokio-tungstenite/commits)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Author: dependabot-preview[bot]

Cargo.lock

@@ -13,7 +13,7 @@ hyper = { version = "0.13" }
 log = "0.4"
 sha-1 = "0.9"
 tokio = { version = "0.2", features = ["full", "sync", "time"] }
-tokio-tungstenite = "0.11.0"
+tokio-tungstenite = "0.12.0"
 toml = "0.5"
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1"