Update wp-cli/wp-cli-tests requirement from ^2.0.7 to ^4.3.1

[dependabot[bot]]

Updates the requirements on wp-cli/wp-cli-tests to permit the latest version.

Release notes

Sourced from wp-cli/wp-cli-tests's releases.

Version 4.3.1

• Update the version of the SQLite plugin [#214]

Commits

• 4d4c920 Merge pull request #214 from jeroenpf/update/sqlite-integration-plugin-version
• 751099f Update the version of the SQLite plugin
• 0c5c2e9 Merge pull request #206 from wp-cli/fix/205-polyfills
• 80ef437 Update gitignore
• ee10ce5 Rename class files
• e6179d2 Support yoast/phpunit-polyfills
• 3cab4c5 Update file(s) from wp-cli/.github
• 8696a18 Merge pull request #199 from thelovekesh/add/wp-versions-file-workflow
• 717555f Add logger for sleep command
• a160b19 Add workflow to generate wp-versions data
• Additional commits viewable in compare view

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