Update dependency psalm/plugin-phpunit to ^0.20.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
psalm/plugin-phpunit	^0.19.0 → ^0.20.0

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Release Notes

psalm/psalm-plugin-phpunit (psalm/plugin-phpunit)

v0.20.0

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What's Changed

• Switch to psalm/psalm-plugin-api 0.1.0 (targeting Psalm v7 beta)
• Bump actions/cache from 3 to 4 by @​dependabot[bot] in #​153
• Bump actions/checkout from 3 to 4 by @​dependabot[bot] in #​152
• Bump actions/cache from 4 to 5 by @​dependabot[bot] in #​157
• Bump actions/checkout from 4 to 6 by @​dependabot[bot] in #​156

Full Changelog: psalm/psalm-plugin-phpunit@0.19.5...0.20.0

v0.19.6

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Configuration

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

🚦 Automerge: Enabled.

♻ Rebasing: Whenever PR is behind base branch, 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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[renovate]

⚠️ Artifact update problem

Renovate failed to update an artifact related to this branch. You probably do not want to merge this PR as-is.

♻ Renovate will retry this branch, including artifacts, only when one of the following happens:

• any of the package files in this branch needs updating, or
• the branch becomes conflicted, or
• you click the rebase/retry checkbox if found above, or
• you rename this PR's title to start with "rebase!" to trigger it manually

The artifact failure details are included below:

File name: composer.lock

Command failed: composer update psalm/plugin-phpunit:0.20.1 --with-dependencies --ignore-platform-req=ext-* --ignore-platform-req=lib-* --no-ansi --no-interaction --no-scripts --no-autoloader --no-plugins --minimal-changes
Loading composer repositories with package information
Updating dependencies
Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - Root composer.json requires psalm/plugin-phpunit ^0.20.0 -> satisfiable by psalm/plugin-phpunit[0.20.1].
    - vimeo/psalm is locked to version 6.16.1 and an update of this package was not requested.
    - psalm/plugin-phpunit 0.20.1 requires psalm/psalm-plugin-api ^0.1 -> satisfiable by psalm/psalm-plugin-api[0.1.0].
    - psalm/psalm-plugin-api 0.1.0 conflicts with vimeo/psalm <7.0.0.

Use the option --with-all-dependencies (-W) to allow upgrades, downgrades and removals for packages currently locked to specific versions.