phpunit-select-config: add passthru support for auto_prepend_file (#47788)

Co-authored-by: Brad Jorsch <anomiex@users.noreply.github.com>

Committed via a GitHub action: https://github.com/Automattic/jetpack/actions/runs/23609401545

Upstream-Ref: Automattic/jetpack@92331be

Author: tbradsha

composer.json

@@ -6,7 +6,7 @@
 	"require-dev": {
 		"yoast/phpunit-polyfills": "^4.0.0",
 		"automattic/jetpack-changelogger": "^6.0.14",
-		"automattic/phpunit-select-config": "^1.0.3"
+		"automattic/phpunit-select-config": "^1.0.4-alpha"
 	},
 	"autoload": {
 		"classmap": [