Fix checks for phpunit releases on Composer 2 (resolves #37601)

Author: colinodell

bin/simple-phpunit

@@ -117,7 +117,11 @@ if (!file_exists("$PHPUNIT_DIR/phpunit-$PHPUNIT_VERSION/phpunit") || md5_file(__
         'requires' => array('php' => '*'),
     );
 
-    if (1 === count($info['versions'])) {
+    $stableVersions = array_filter($info['versions'], function($v) {
+        return !preg_match('/-dev$|^dev-/', $v);
+    });
+
+    if (!$stableVersions) {
         $passthruOrFail("$COMPOSER create-project --ignore-platform-reqs --no-install --prefer-dist --no-scripts --no-plugins --no-progress -s dev phpunit/phpunit phpunit-$PHPUNIT_VERSION \"$PHPUNIT_VERSION.*\"");
     } else {
         $passthruOrFail("$COMPOSER create-project --ignore-platform-reqs --no-install --prefer-dist --no-scripts --no-plugins --no-progress phpunit/phpunit phpunit-$PHPUNIT_VERSION \"$PHPUNIT_VERSION.*\"");