Redis support for the bb8 connection pool.

Example

use futures_util::future::join_all;
use bb8_redis::{
bb8,
redis::{cmd, AsyncCommands},
RedisConnectionManager
};

#[tokio::main]
async fn main() {
let manager = RedisConnectionManager::new("redis://localhost").unwrap();
let pool = bb8::Pool::builder().build(manager).await.unwrap();

let mut handles = vec![];

for _i in 0..10 {
let pool = pool.clone();

handles.push(tokio::spawn(async move {
let mut conn = pool.get().await.unwrap();

let reply: String = cmd("PING").query_async(&mut *conn).await.unwrap();

assert_eq!("PONG", reply);
}));
}

join_all(handles).await;
}