fix: adding test clause

Author: nicky6s

src/test/java/net/sf/jsqlparser/statement/delete/DeleteTest.java

@@ -396,6 +396,7 @@ public void testDeleteWithSkylineKeywords() throws JSQLParserException {
            """;
         Delete delete = (Delete) assertSqlCanBeParsedAndDeparsed(statement);
         assertEquals("mytable", delete.getTable().toString());
+        assertEquals("low = 1 AND high = 2 AND inverse = 3 AND plus = 4 AND preferring = 5", delete.getWhere().toString());
     }
 
 }