onlyerror 0.1.3

Obsessively tiny error derive macro
Documentation
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Obsessively tiny error derive macro.

# Why?

- 100% safe Rust 🦀.
- `no_std` support.
- Fast compile times.
  - See [`myn` benchmark results]https://github.com/parasyte/myn/blob/main/benchmarks.md.

## MSRV Policy

The Minimum Supported Rust Version for `onlyerror` will always be made available in the [MSRV.md](./MSRV.md) file on GitHub.