[Feature Request]: Upgrade postgreSQL's version and update syntax file

[Cythia828]

Reference

DTStack/monaco-sql-languages#176

Topic

Enhance existing features

Description

Someone wants to use MERGE operation in WITH clauses of WITH...SELECT statements.But the version 16 which we supported not allow. So we need to update it.

有人已经有了使用版本17上一些新语法的需求，例如有人提出的在WITH...SELECT的WITH从句中使用MERGE操作，但16是不支持的，所以我们需要支持一下。