Null refference assertions when passing a null Action in the callback extension method

[Mariusvin]

Hello PrimeTween team,
I've encountered an issue when using the .OnComplete(Action callback) method with null callbacks. Currently, when a null callback is passed to this method, it raises errors in the console.

PrimeTween.Assert:LogError (string,long,UnityEngine.Object) (at ./Library/PackageCache/com.kyrylokuzyk.primetween@2cb038d4150a/Runtime/Internal/Assert.cs:7)
PrimeTween.ReusableTween:handleOnCompleteException (System.Exception) (at ./Library/PackageCache/com.kyrylokuzyk.primetween@2cb038d4150a/Runtime/Internal/ReusableTween.cs:413)

Current behavior:
When passing a null value to .OnComplete(Action callback), the method attempts to invoke the callback without checking if it's null first, resulting in console errors.

Suggested improvement:
Could the implementation be updated to include a null check before invoking the callback? Something like:
callback?.Invoke();

This would prevent errors (and redundant checks) when null callbacks are being passed,

[KyryloKuzyk]

Hey,
That's a good catch, I'll fix this in the next version. Thank you!