Use TypedDict for **kwargs type checking

[e3243eric]

What was wrong?

web3.py/web3/eth/eth.py

Lines 551 to 555 in 168fcea

	# todo: Update Any to stricter kwarg checking with TxParams
	# https://github.com/python/mypy/issues/4441
	def modify_transaction(
	self, transaction_hash: _Hash32, **transaction_params: Any
	) -> HexBytes:

After Mypy 0.981, it supports precise type annotations for **kwargs using TypedDict (python/mypy#13471), like **transaction_params: Any can be rewritten as **transaction_params: Unpack[TxParams].

How was it fixed?

• Upgrade Mypy to 0.981.
• Update **kwarg type checking with Unpack[TxParams].
• Add Unpack type. The Unpack is a built-in type after Python 3.11, so I updated the web3/_utils/compat.

Todo:

• Add entry to the release notes

Cute Animal Picture

[e3243eric]

The remaining lint errors are from the submodule ethpm-spec.

[pacrob]

Unpack does look useful, but we can't include something that is labeled "experimental" and "incomplete" in a release. Thanks for bringing it up, though. I'll leave this open and check back on it in a few months.

[fselmo]

As far as I know this is still an experimental feature. I'm open to including it, but I'm not certain that it's desirable at this stage. Considering this for the next major release, v8, might be best.

[pacrob]

Unpack is out of experimental in more recent mypy versions. I've rebased and applied the changes to the async versions. Can discuss inclusion timeline.

[fselmo]

Nice find. I think we should aim to put in v7 then. Thoughts?

[pacrob]

No reason not to include in v7 from me.

[fselmo]