Update undici dependency

[ericglau]

response.body.json(); previously returned any, but now returns unknown in newer version of undici. We should cast it to the expected type.

[socket-security]

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Packages	Version	New capabilities	Transitives	Size	Publisher
undici	5.28.2	environment	+1	1.25 MB	matteo.collina

[ernestognw]

LGTM with some comments:

I'm not convinced about the as <Type> casts. Following these recommendations, we should create functions for checking types, for example:

function isEtherscanResponseBody(input: any): json is EtherscanResponseBody {
  return 'status' in input;
} 

However, I also don't think we should accumulate these type-checking functions all over the place. The current state is good to me but mentioning in case you agree with "better" type-checking @ericglau

[ericglau]

@ernestognw Agree it would be good to improve type checking, but perhaps that can be left until/unless there are changes in Etherscan's API or issues with the current approach. I don't a large benefit in adding checking at the moment, other than to give a better error message, but if errors occur then the issue might be quite apparent.

Note that Hardhat currently does a cast as well.