Update dependency test-unit to v3.6.4

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
test-unit (source)	'3.6.3' -> '3.6.4'

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Release Notes

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

v3.6.4: test-unit 3.6.4 - 2024-11-28

Compare Source

Improvements

• Added support for Ruby 3.4.0.

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Configuration

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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 9min).