Results 3 issues of gai takano

Plugin not support postgres UUID datatype now. UUID have become generally used, so I'd be happy if you could support them. ``` 2022-02-12 12:40:27.749 +0900: Embulk v0.9.23 -- 2022-02-12 12:40:30.771...

Support `OWNER TO` clause just for Postgres dialect Closes #1293

## Version sqlparser = "0.46.0" ## https://www.postgresql.org/docs/16/sql-altertable.html ```rust use sqlparser::dialect::PostgreSqlDialect; use sqlparser::parser::Parser; fn main() { let sql = "-- auto-generated definition alter table my_table owner to my_user"; let dialect =...