Slow down crate publish more (#1911)

            if !is_published(&package.handle).await? {

                publish(&package.handle, &package.crate_path).await?;

                // Keep things slow to avoid getting throttled by crates.io

                tokio::time::sleep(Duration::from_secs(2)).await;

                // Sometimes it takes a little bit of time for the new package version

                // to become available after publish. If we proceed too quickly, then

                // the next package publish can fail if it depends on this package.

                wait_for_eventual_consistency(&package).await?;

                info!("Successfully published `{}`", package.handle);

                any_published = true;

                // Keep things slow to avoid getting throttled by crates.io

                tokio::time::sleep(Duration::from_secs(1)).await;

            } else {

                info!("`{}` was already published", package.handle);

            }