Update dependency test-unit to v3.6.3

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
test-unit (source)	'3.6.2' -> '3.6.3'

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Release Notes

test-unit/test-unit (test-unit)

### [`v3.6.3`](https://redirect.github.com/test-unit/test-unit/releases/tag/3.6.3): test-unit 3.6.3 - 2024-11-24 [Compare Source](https://redirect.github.com/test-unit/test-unit/compare/3.6.2...3.6.3) ##### Improvements - Added support for thread based parallel test running. You can use it by the `--parallel=thread` option. You can disable parallel test running per test case by defining `parallel_safe?` class method that returns `false`. - [GH-235](https://redirect.github.com/test-unit/test-unit/issues/235) - Patch by Tsutomu Katsube - Added the `--n-workers` option. - Added the `--[no-]report-slow-tests` option. You can show the top 5 slow tests with this option. - [GH-253](https://redirect.github.com/test-unit/test-unit/issues/253) - Patch by Tsutomu Katsube - UI: console: Add support for outputting `Exception#cause`. - Added support for inspecting `BasicObject`. - [GH-262](https://redirect.github.com/test-unit/test-unit/issues/262). - Patch by Yuta Saito ##### Thanks - Tsutomu Katsube - Yuta Saito

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[yegor256]

@rultor please, try to merge, since 4 checks have passed

[rultor]

@rultor please, try to merge, since 4 checks have passed

@yegor256 OK, I'll try to merge now. You can check the progress of the merge here.

[rultor]

@rultor please, try to merge, since 4 checks have passed

@yegor256 Done! FYI, the full log is here (took me 8min).