文件一：src\think\db\connector\Sqlite.php

protected function supportSavepoint()
-->
protected function supportSavepoint(): bool

文件二：src\think\db\builder\Sqlite.php

public function parseKey(Query $query, $key, bool $strict = false)
-->
public function parseKey(Query $query, $key, bool $strict = false): string


public function parseLimit(Query $query, $limit)
-->
public function parseLimit(Query $query, $limit):string

可能还有其他地方也有类似的问题，现在Sqlite无法使用