Update Rust crate serial_test to v4

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
serial_test	dev-dependencies	major	3.3.1 → 4.0.0

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Warning

Some dependencies could not be looked up. Check the Dependency Dashboard for more information.

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Release Notes

palfrey/serial_test (serial_test)

v4.0.1

Compare Source

As per v4.0.0, but with the root MSRV correctly set to 1.93.1

v4.0.0

Compare Source

What's Changed

• MSRV is now 1.93.1
• refactor(derive)!: bump syn to v3 by @​AudaciousAxiom in #​159

New Contributors

• @​AudaciousAxiom made their first contribution in #​159

Full Changelog: palfrey/serial_test@v3.5.0...v4.0.0

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Configuration

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[codspeed-hq]

Merging this PR will regress 1 benchmark

⚡ 1 improved benchmark
❌ 1 regressed benchmark
✅ 1960 untouched benchmarks
⏩ 89 skipped benchmarks¹

Warning

Please fix the performance issues or acknowledge them on CodSpeed.

Performance Changes

	Mode	Benchmark	BASE	HEAD	Efficiency
❌	Simulation	take[small_m/shuffled/primitive/nonnull/chunks=16384/indices=16]	1.1 ms	1.2 ms	-10.97%
⚡	Simulation	cold_misaligned[(64, 256)]	5 ms	4.4 ms	+14.26%

Tip

Investigate this regression by commenting @codspeedbot fix this regression on this PR, or directly use the CodSpeed MCP with your agent.

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_{Comparing renovate/serial_test-4.x (c62cc81) with develop (c4bb934)}

Footnotes

1. 89 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩