Egress - barebones regression testing for Rust

Egress is a super simple regression testing framework for Rust. It doesn't currently support much, but if all you want is to make sure some test outputs don't change from run to run, it'll do the trick.

By default, Egress will make an Egress.toml config file in the same directory as your Cargo.toml and an egress folder in the same place to hold the artifacts it writes to disk.

Example

```rust let mut egress = egress!(); let artifact = egress.artifact("basic_arithmetic");

let supercomplextestoutputthatcouldchangeatany_time = 1 + 1;

// using serde::Serialize: artifact.insertserialize("1 + 1 (serde)", &supercomplextestoutputthatcouldchangeatanytime);

// or using fmt::Debug: artifact.insertdebug("1 + 1 (fmt::Debug)", &supercomplextestoutputthatcouldchangeatanytime);

// or using fmt::Display: artifact.insertdisplay("1 + 1 (fmt::Display)", &supercomplextestoutputthatcouldchangeatanytime);

// More options available; please check the docs.

egress.close().unwrap().assert_unregressed(); ```

To see the artifacts produced by this example, check egress/artifacts/rust_out/basic_arithmetic.json.