Revert "Revert "Update phpunit and phpunit-polyfills to fix CI composer install""

This reverts commit 19a5cb5.

Author: adamziel

composer.json

@@ -19,8 +19,8 @@
 		"wp-coding-standards/wpcs": "^3.1",
 		"phpcompatibility/phpcompatibility-wp": "*",
 		"php-parallel-lint/php-parallel-lint": "^1.3",
-		"yoast/phpunit-polyfills": "2.0.0",
-		"phpunit/phpunit": "8.5.38"
+		"yoast/phpunit-polyfills": "^2.0.0",
+		"phpunit/phpunit": "^8.5.52"
 	},
 	"config": {
 		"allow-plugins": {