<!-- Describe your changes here -->

## Checklist

- [ ] Change is covered by automated tests
- [ ] Benchmark results are attached (if applicable)
- [ ] The [coding guidelines] are followed
- [ ] Public API has proper documentation
- [ ] Example projects and code samples are up-to-date (in case of API changes)
- [ ] Changelog is updated (in case of notable or breaking changes)

[coding guidelines]: https://github.com/cossacklabs/themis/blob/master/CONTRIBUTING.md
