Add support for ethers v6 in @typechain/hardhat

[fvictorio]

Closes #842.

Tentative changes. I tried this locally and seems to work.

Something I don't like about my implementation is that the contract-specific types for deployContract don't have the right constructor parameters types. I'm not sure how to do this properly, but it seems to me that generateHardhatHelper should receive more information about the contracts to be able to do that, and not just the names.

I also changed some docs to use our chai matchers instead of waffle, since that's the approach we recommend, and because the chai matchers will have support for ethers v6 (and waffle doesn't yet afaik).

[changeset-bot]

🦋 Changeset detected

Latest commit: 137ebd0

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 2 packages

Name	Type
@typechain/hardhat	Major
@typechain/ethers-v6	Minor

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Pull request alert summary

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Install scripts	✅ 0 issues
Native code	✅ 0 issues
Bin script shell injection	✅ 0 issues
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📊 Modified Dependency Overview:

➕ Added Package	Capability Access	+/- Transitive Count	Publisher
@nomicfoundation/[email protected]	None	+6	fvictorio
@nomicfoundation/[email protected]	None	+5	fvictorio

⬆️ Updated Package	Version Diff	Added Capability Access	+/- Transitive Count	Publisher
[email protected]	5.4.0...6.3.0	None	+3/-27	ricmoo

🚮 Removed packages: @nomiclabs/[email protected], @nomiclabs/[email protected]

[fvictorio]

I tested this more and pushed some fixes. It would be great if you could get this merged and released soon, so we can release a new version of our Toolbox with proper Typechain support for ethers v6 ❤️

[krzkaczor]

why change this?

[fvictorio]

My bad, this is a leftover of when I was trying things locally with verdaccio. I'll undo it.

[krzkaczor]

@fvictorio note i fixed this and all other issues in: #845

[krzkaczor]

I think thit is a slight bug in ethers-v6 target that causes double preamble. Wanna have a look?

[fvictorio]

Done.