Bump phpunit/phpunit from 9.5.20 to 9.5.21

Created by: dependabot[bot]

Bumps phpunit/phpunit from 9.5.20 to 9.5.21.

Changelog

Sourced from phpunit/phpunit's changelog.

[9.5.21] - 2022-06-19

Fixed

• #4950: False error on atMost() invocation rule without call
• #4962: Ukraine banner unreadable on white background

Commits

• 0e32b76 Prepare release
• b5ffcdc Merge branch '8.5' into 9.5
• df70070 Prepare release
• bfce0cc Merge branch '8.5' into 9.5
• 6eb8577 Eliminate code duplication
• c396a42 Merge branch '8.5' into 9.5
• b126330 Remove unused code
• bcaa5a2 Merge branch '8.5' into 9.5
• 872c971 Refactor
• 6e89191 Merge branch '8.5' into 9.5
• Additional commits viewable in compare view

Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting @dependabot rebase.

---

Dependabot commands and options

You can trigger Dependabot actions by commenting on this PR:

• @dependabot rebase will rebase this PR
• @dependabot recreate will recreate this PR, overwriting any edits that have been made to it
• @dependabot merge will merge this PR after your CI passes on it
• @dependabot squash and merge will squash and merge this PR after your CI passes on it
• @dependabot cancel merge will cancel a previously requested merge and block automerging
• @dependabot reopen will reopen this PR if it is closed
• @dependabot close will close this PR and stop Dependabot recreating it. You can achieve the same result by closing it manually
• @dependabot ignore this major version will close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself)
• @dependabot ignore this minor version will close this PR and stop Dependabot creating any more for this minor version (unless you reopen the PR or upgrade to it yourself)
• @dependabot ignore this dependency will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself)