[ProcessBar] live update elapsed time for processor bar

[howieyuen]

The elapsed time is never changed, just stuck at 3s.
I was wondering whether we can do a live update for elapsed time.

example code:

func main() {
	showcases := []string{
		"Run short time job 1",
		"Run short time job 2",
		"Run short time job 3",
		"Run long time job 4",
	}

	pb, _ := pterm.DefaultProgressbar.
		WithTotal(len(showcases)).
		WithWriter(os.Stdout).
		Start()
	for i, showcase := range showcases {
		pb.UpdateTitle(showcase)
		if i >= 3 {
			time.Sleep(5 * time.Second)
		} else {
			time.Sleep(1 * time.Second)
		}
		pterm.Success.WithWriter(os.Stdout).Println(showcase)
		pb.Increment()
	}
}

git record: