fix: resolve issue with xdebug.mode not being set

[owenvoke]

Related discussion: pestphp/pest#226

Description

When using coverage: xdebug on macOS and Windows (Linux correctly uses Xdebug 2 for now on PHP <=7.4), it appears to fail on PHP 7.x as Xdebug 3 is being installed, rather than Xdebug 2.x. As this bit of code is expecting for coverage: xdebug3 or PHP 8 to add the xdebug.mode=coverage line, this never gets set.

• This workflow is with the current version of Setup PHP
• This workflow is with the commit from this PR applied

I've created some workflows that tested against all PHP versions back to 5.3, and their compatible PHPUnit version.

• With the current version
• With the PR changes

On the current version, PHPUnit flags a warning that xdebug.mode=coverage has to be set in php.ini. I'm also not sure why XDEBUG_CC_UNUSED is undefined on PHP 7.2 for macOS and Windows.

In case this PR introduced TypeScript/JavaScript code changes:

• I have written test cases for the changes in this pull request
• I have run npm run format before the commit.
• I have run npm run lint before the commit.
• I have run npm run release before the commit.
• npm test returns with no unit test errors and all code covered.

In case this PR edits any scripts:

• I have checked the edited scripts for syntax.
• I have tested the changes in an integration test (If yes, provide workflow YAML and link).

[owenvoke]

Just noticed you've already committed changes to this effect. 👍🏻 fce77af

Thanks @shivammathur for all your work on this.

[shivammathur]

@owenvoke Thanks for testing this, fix will be in next release shortly.

[shivammathur]

@owenvoke Merged in 2.9.0 and the issue should be fixed.