tests: compatibility with MySQL 8

Author: dg

tests/Database/Reflection.phpt

@@ -91,6 +91,10 @@ $expectedColumns = [
 
 switch ($driverName) {
 	case 'mysql':
+		$version = $connection->getPdo()->getAttribute(\PDO::ATTR_SERVER_VERSION);
+		if (version_compare($version, '8.0', '>=')) {
+			$expectedColumns[0]['size'] = null;
+		}
 		break;
 	case 'pgsql':
 		$expectedColumns[0]['nativetype'] = 'INT4';