Properly support creating pay-per-request tables

[alexjurkiewicz]

When creating a table in pay-per-request billing mode, don't specify provisioned throughput for GSIs.

It might be better to create two classes of the Table type, one for each billing mode. But that's a major (probably breaking) refactor, and the AWS API doesn't do this either.

[ojii]

For reference: https://docs.aws.amazon.com/amazondynamodb/latest/APIReference/API_CreateTable.html

Oddly enough, the docs don't explain this clearly, it just mentions that ProvisionedThroughput on a GSI spec is optional...

Anyway, thank you for noticing this and the PR.

[ojii]

CI currently failing because 3.7 is EOL'd, please wait for https://github.com/HENNGE/aiodynamo/pull/161 to merge and then rebase (or I'll rebase & merge offline)

[alexjurkiewicz]

Done

[ojii]

mypy is being silly, i'll fix it.

[alexjurkiewicz]

I was looking too 😊 My fix is a little ugly, but satisfies the checker

[ojii]

merged locally, so closing this PR. Thank you.

[alexjurkiewicz]

Thanks for the help!