Create the StatementFlags value object

Signed-off-by: Maurício Meneghini Fauth <mauricio@fauth.dev>

Author: MauricioFauth

README.md

@@ -72,7 +72,7 @@ $query = 'OPTIMIZE TABLE tbl';
 $parser = new Parser($query);
 $flags = Query::getFlags($parser->statements[0]);
 
-echo $flags['querytype']?->value;
+echo $flags->queryType?->value;
 ```
 
 ### Parsing and building SQL query