deps: replace pysha3 with pycryptodome

[elopez]

pysha3 is unmaintained and does not build on Python 3.11

[ekilmer]

@elopez I'm curious why pycryptodome was chosen. Is there any benefit over using hashlib from standard Python? The pysha3 documentation states that hashlib is preferred (under Usage section) for Python 3.6+

The hashlib module of Python 3.6 will support the four SHA-3 algorithms and the two SHAKE algorithms on all platforms. Therefore you shouldn’t use the sha3 module directly and rather go through the hashlib interface:

[elopez]

Hi @ekilmer, we went with pycryptodome because hashlib did not offer keccak256 (the one used in ethereum) -- they only have the standardised sha3

[ekilmer]

Ah! I did not realize there was an appreciable difference between the standardized sha3 and keccak256! Thank you for the explanation 🙂