The syntax of mysql RENAME TABLE tb1 TO tb2 is not supported.

```rust
    let sql = "RENAME TABLE `test`.`test` TO `test`.`test2`";

    let dialect = MySqlDialect {};
    let ast = Parser::parse_sql(&dialect, sql).unwrap();

    println!("AST: {:#?}", ast);
```

output error:
```
called `Result::unwrap()` on an `Err` value: ParserError("Expected: an SQL statement, found: RENAME at Line: 1, Column: 1")
```