feat: support pg serial type for auto_increment (#1563)

* add correct example for pg's url

* 🐞 fix: merge

* 🐞 fix: pg default port

* ✨ feat: support serial type

Co-authored-by: kurimi1 <d0n41df@gmail.com>

tools/goctl/goctl.go

@@ -690,7 +690,7 @@ var commands = []cli.Command{
 						Flags: []cli.Flag{
 							cli.StringFlag{
 								Name:  "url",
-								Usage: `the data source of database,like "postgres://root:password@127.0.0.1:54332/database?sslmode=disable"`,
+								Usage: `the data source of database,like "postgres://root:password@127.0.0.1:5432/database?sslmode=disable"`,
 							},
 							cli.StringFlag{
 								Name:  "table, t",