This package has been deprecated and all logic moved to the `perist` module of the
[cqrs-es crate](https://crates.io/crates/cqrs-es).
Configuring persistence now only requires the `cqrs-es` and one of the available repositories.
Example `Cargo.toml`:
```toml
[dependencies]
cqrs-es = "0.3.0"
postgres-es = "0.3.0"
```