Lapin integration with async-global-executor

This crate integrates lapin with async-global-executor by using its executor inside of lapin for its internal operations and for consumer delegates.

``` use lapinasyncglobal_executor::*; use lapin::{Connection, ConnectionProperties, Result};

fn main() -> Result<()> { asyncglobalexecutor::run(async { let addr = std::env::var("AMQPADDR").unwraporelse(|| "amqp://127.0.0.1:5672/%2f".into()); let conn = Connection::connect(&addr, ConnectionProperties::default().withasyncglobalexecutor()).await?; // Note the with_async_global_executor() here let channel = conn.createchannel().await?;

    // Rest of your program
})

} ```