v4.0.0 `idempotency_key` parameter unknown

[newenegue]

Describe the bug

Any of our requests to POST /v1/subscriptions, POST /v1/invoices and POST /v1/customers/:id are failing with Received unknown parameter: idempotency_key

To Reproduce

Make a request to create a customer and include the idempotency_key parameter

stripe.Customer.create(
  name="John Doe",
  email=email,
  idempotency_key="test-key-12345",
)

Expected behavior

idempotency_key is an accepted parameter

Code snippets

No response

OS

macOS

Language version

Python 3.7.3

Library version

stripe-python v4.0.0

API version

2019-05-16

Additional context

No response

[remi-stripe]

@newenegue thanks a lot for the report. There is definitely something wrong where some API methods don't handle options like idempotency_key and api_key properly but others do. We're investigating but for now you should roll back to the previous major.

[newenegue]

@remi-stripe thanks for the response! We've rolled back to v3.5.0 and everything is working as expected.

[ramya-stripe]

We have just released version 4.0.1 of the package which has the fix for this issue. Rolling back to previous major is no longer necessary.