Update to Tokio and Bytes 1.0 (#504)

examples/akamai.rs

@@ -1,3 +1,7 @@
+fn main() {
+    eprintln!("TODO: Re-enable when tokio-rustls is upgraded.");
+}
+/*
 use h2::client;
 use http::{Method, Request};
 use tokio::net::TcpStream;
@@ -73,3 +77,4 @@ pub async fn main() -> Result<(), Box<dyn Error>> {
     }
     Ok(())
 }
+*/