chore(deps): update rust crate serial_test to 3.1.0

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
serial_test	dev-dependencies	minor	3.0.0 -> 3.1.0

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Release Notes

palfrey/serial_test (serial_test)

### [`v3.1.0`](https://togithub.com/palfrey/serial_test/releases/tag/v3.1.0) [Compare Source](https://togithub.com/palfrey/serial_test/compare/v3.0.0...v3.1.0) #### What's Changed - Replace `lazy_static` with `once_cell` by [@​Expyron](https://togithub.com/Expyron) in [https://github.com/palfrey/serial_test/pull/106](https://togithub.com/palfrey/serial_test/pull/106) - Replace `dashmap` with `scc` by [@​palfrey](https://togithub.com/palfrey) in [https://github.com/palfrey/serial_test/pull/109](https://togithub.com/palfrey/serial_test/pull/109) - Standard test attribute worked with `mod`, others didn't (e.g. `tokio::test`) by [@​palfrey](https://togithub.com/palfrey) in [https://github.com/palfrey/serial_test/pull/110](https://togithub.com/palfrey/serial_test/pull/110) #### New Contributors - [@​Expyron](https://togithub.com/Expyron) made their first contribution in [https://github.com/palfrey/serial_test/pull/106](https://togithub.com/palfrey/serial_test/pull/106) **Full Changelog**: https://github.com/palfrey/serial_test/compare/v3.0.0...v3.1.0

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