Update dependency minitest to v5.20.0

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
minitest	'5.19.0' -> '5.20.0'

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Release Notes

minitest/minitest (minitest)

### [`v5.20.0`](https://togithub.com/minitest/minitest/compare/v5.19.0...v5.20.0) [Compare Source](https://togithub.com/minitest/minitest/compare/v5.19.0...v5.20.0)

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Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

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• [ ] If you want to rebase/retry this PR, check this box

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This PR has been generated by Mend Renovate. View repository job log here.

[0crat]

@renovate/z[bot] this pull request is too small, just 2 lines changed (less than 10), there will be no formal code review, see §53 and §28; in the future, try to make sure your pull requests are not too small; @yegor256/z please review this and merge or reject

[yegor256]

@rultor please, try to merge, since 6 checks have passed

[rultor]

@rultor please, try to merge, since 6 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 6 checks have passed

@yegor256 Done! FYI, the full log is here (took me 2min)

[0crat]

Job gh:yegor256/zache#66 is not assigned, can't get performer

[0crat]

There is an unrecoverable failure on my side. Please, submit it here:

PID: 2@de4348d3-9b62-4d9e-b1a2-298131f2f833, thread: PQ-C3RFVLU72
com.zerocracy.farm.strict.StrictProject[122] java.lang.IllegalArgumentException: File "blanks/renovate[bot].xml" is not accessible in "PMO"

1.0-SNAPSHOT: CID: 082fe8ca-78c6-4431-ac93-1b18613a3238, Type: "Close job"