add py.typed

[jack60612]

added py.typed file and instructed setuptools to keep in all wheels / releases

[coveralls-official]

Pull Request Test Coverage Report for Build 6935032173

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 95.066%

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Totals
Change from base Build 6867772187:	0.0%
Covered Lines:	918
Relevant Lines:	955

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💛 - Coveralls

[arvidn]

I assumed you'd have to create an empty file.
Did you see what would happen to chia-blockchain with this change?

[jack60612]

I assumed you'd have to create an empty file. Did you see what would happen to chia-blockchain with this change?

I have not, ill look locally in a bit.

[altendky]

note #125 and the wildly out of date Chia-Network/chia-blockchain#9387

[altendky]

Or the not out of date but also no change to blockchain except using #125... Chia-Network/chia-blockchain#16898 with mypy results at https://github.com/Chia-Network/chia-blockchain/actions/runs/6938161509/job/18873463089?pr=16898