fixes for PHP 7.4

Author: dg

Diff for: src/Database/Drivers/SqliteDriver.php

@@ -147,7 +147,7 @@ public function getColumns(string $table): array
 				'size' => isset($type[1]) ? (int) $type[1] : null,
 				'nullable' => $row['notnull'] == '0',
 				'default' => $row['dflt_value'],
-				'autoincrement' => (bool) preg_match($pattern, (string) $meta['sql']),
+				'autoincrement' => $meta && preg_match($pattern, (string) $meta['sql']),
 				'primary' => $row['pk'] > 0,
 				'vendor' => (array) $row,
 			];