Announcing diesel-async 0.4

I'm happy to announce the release of diesel-async 0.4.. diesel-async provides drop-in non-blocking Connection implementations for diesel, the fast and safe ORM and query-builder for Rust. This release includes two new features. It improves the configurability of our connection pooling solutions. In addition to these enhancements, this version also introduces a new feature that allows users to transform an async diesel_async::AsyncConnection into a sync diesel::Connection. See the release announcement for more details.