Fix a problem in dotween where an extra update would run after canceling

[hadashiA]

#301

[hadashiA]

#378 #429 #468
These do not seem to be improved by modifying the timing of the originalUpdateAction.
I'll investigate further.

[hadashiA]

📝 Update process for each frame of DOTween.

flowchart TB
    apply["ApplyTween"]
    
    onupdate["tween.onUpdate"]  
    kill["tween.Kill"]
    null["Null error log"]

    checkToken{"CancellationToken.IsCancellationRequested ?"}
    checkTween{"kill or completed ?"}
    checkDestroy{"destroyed ?"}

    style null stroke:#f66
    style kill stroke:#ff3
    style checkToken stroke:#ff3

    apply -->checkDestroy
    checkDestroy-->|No| onupdate
    checkDestroy-->|Yes| null
    onupdate-->checkToken
    checkToken-->|Yes| kill-->checkTween
    checkToken-->|No| checkTween
    checkTween-->|No| apply
    checkTween-->|Yes| Done

Loading

[hadashiA]

After discussion, Use CancellationToken.Register to stop the tween without delay.

[neuecc]

thanks, I've checked, ok to merge.