Update phpunit/phpunit requirement from ^7.0 to ^7.0 || ^8.0

[dependabot[bot]]

Updates the requirements on phpunit/phpunit to permit the latest version.

Changelog

Sourced from phpunit/phpunit's changelog.

[8.5.8] - 2020-06-22

Fixed

• #4312: Fix for #4299 breaks backward compatibility

[8.5.7] - 2020-06-21

Fixed

• #4299: "No tests executed" does not always result in exit code 1
• #4306: Exceptions during code coverage driver initialization are not handled correctly

[8.5.6] - 2020-06-15

Fixed

• #4211: phpdbg_*() functions are scoped to PHPUnit\phpdbg_*()

[8.5.5] - 2020-05-22

Fixed

• #4033: Unexpected behaviour when $GLOBALS is deleted

[8.5.4] - 2020-04-23

Changed

• Changed how PHPUnit\TextUI\Command passes warnings to PHPUnit\TextUI\TestRunner

[8.5.3] - 2020-03-31

Fixed

• #4017: Do not suggest refactoring to something that is also deprecated
• #4133: expectExceptionMessageRegExp() has been removed in PHPUnit 9 without a deprecation warning being given in PHPUnit 8
• #4139: Cannot double interfaces that declare a constructor with PHP 8
• #4144: Empty objects are converted to empty arrays in JSON comparison failure diff

[8.5.2] - 2020-01-08

Removed

• eval-stdin.php has been removed, it was not used anymore since PHPUnit 7.2.7

[8.5.1] - 2019-12-25

Changed

... (truncated)

Commits

• 34c18ba Closes #4312
• 809b4bf Prepare release
• fa13e61 Update Psalm baseline
• 56f8e8e Simplify
• 3a600ed Mark TestCase::$backupGlobals as nullable
• 1c95329 Closes #4306
• a4baf33 Update tools
• 8eaf853 Remove test which a) does not seem to work on GitHub Actions (but does locall...
• 0ae8690 Closes #4299
• 7258f8f Only print resource usage information when tests were run
• 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)