"set_frequency_once" always execute immediately.

[gamife]

Describe the bug
set_frequency_once_by_seconds(5)
The function is executed immediately instead of being delayed for some time

To Reproduce

use std::time::Duration;

use delay_timer::prelude::{DelayTimerBuilder, ScheduleIteratorTimeZone, TaskBuilder};

#[tokio::main]
async fn main() {
    let body = || async {
        println!("running: {}", chrono::Local::now());
    };

    println!("start: {}", chrono::Local::now());
    let new_task = TaskBuilder::default()
        .set_task_id(1)
        .set_schedule_iterator_time_zone(ScheduleIteratorTimeZone::Local)
        .set_frequency_once_by_seconds(5)
        .set_maximum_parallel_runnable_num(1)
        .spawn_async_routine(body)
        .unwrap();

    let delay_timer = DelayTimerBuilder::default().build();
    delay_timer.add_task(new_task).unwrap();

    tokio::time::sleep(Duration::from_secs(15)).await;
    println!("end: {}", chrono::Local::now());
}

delay_timer = { version = "0.11.0", features = ["status-report"] }
chrono = "0.4.19"
tokio = { version = "1", features = ["full"] }

Result

start: 2022-04-22 10:56:01.732017356 +08:00
running: 2022-04-22 10:56:02.793417770 +08:00
end: 2022-04-22 10:56:16.796830865 +08:00

Expected behavior
Expect a five-second delay.

Desktop (please complete the following information):

• OS: Linux version 3.10.0-957.el7.x86_64 (gcc version 4.8.5 20150623 (Red Hat 4.8.5-36) (GCC) )
• Rust: rustc 1.59.0 (9d1b2106e 2022-02-23)

[BinChengZhao]

Expected behavior Expect a five-second delay.

Desktop (please complete the following information):

• OS: Linux version 3.10.0-957.el7.x86_64 (gcc version 4.8.5 20150623 (Red Hat 4.8.5-36) (GCC) )
• Rust: rustc 1.59.0 (9d1b2106e 2022-02-23)

Friend your scene I have reproduced,

The specific behavior is as follows:

First-time immediate execution,
From the second time onwards, the execution is delayed at regular intervals.

I will find time to adjust the program behavior in the near future, thanks for your feedback!

[BinChengZhao]

@gamife Fix at V0.11.2, I look forward to your feedback on successful use.

:)

[Xiaobaishushu25]

可以实现这种这种效果吗？public void schedule(TimerTask task, long delay, long period)：创建完成后延迟delay执行一次，随后每period执行一次.
另外好像要么执行一次（set_frequency_once），要么指定执行次数，有无限执行的选择不？