Modes not working -> Extend unit test

Hy dear LifeHash developers,

nice project. Yet, using you code with python 3.13 sadly made some issues.
It seems you are expecting to have the "+" operator to be defined on a hashlib.sha256 as well as hashlib.sha256 on another hashlib.sha256 ( sha256(sha256(bytes)) ).
lifehash/lifehash.py line 1024 thus fails. I think you just need to add a few .digest() here and there.

I get why you did not see that. I strongly suggest to extend you unit tests to test *all* modes for you LifeHash. Currently you only test version2.

Comienza en lifehash/lifehash.py, línea 1024, e inspecciona cómo se combinan los valores de hashlib.sha256 en Python 3.13. Revisa las pruebas unitarias existentes, que actualmente solo cubren version2, y luego ejecútalas mientras compruebas los otros modos de LifeHash. Se considera terminado cuando se haya gestionado la ruta de hashing que falla y las pruebas cubran todos los modos.

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