Update GenericDialect with update order by support

Author: tpyo

src/dialect/generic.rs

@@ -133,6 +133,10 @@ impl Dialect for GenericDialect {
         true
     }
 
+    fn supports_update_order_by(&self) -> bool {
+        true
+    }
+
     fn supports_from_first_select(&self) -> bool {
         true
     }

tests/sqlparser_mysql.rs

@@ -2788,7 +2788,7 @@ fn parse_update_with_joins() {
 #[test]
 fn parse_update_with_order_by() {
     let sql = "UPDATE foo SET bar = false WHERE foo = true ORDER BY foo ASC";
-    match mysql().verified_stmt(sql) {
+    match mysql_and_generic().verified_stmt(sql) {
         Statement::Update(Update { order_by, .. }) => {
             assert_eq!(
                 vec![OrderByExpr {
@@ -2813,7 +2813,7 @@ fn parse_update_with_order_by() {
 #[test]
 fn parse_update_with_order_by_and_limit() {
     let sql = "UPDATE foo SET bar = false WHERE foo = true ORDER BY foo ASC LIMIT 10";
-    match mysql().verified_stmt(sql) {
+    match mysql_and_generic().verified_stmt(sql) {
         Statement::Update(Update { order_by, limit, .. }) => {
             assert_eq!(
                 vec![OrderByExpr {