Incompatible with "Paddle Billing"

[mikeseese]

The payload for notifications is different for Paddle Billing, the default setting for new Paddle accounts. For example alert_name was renamed to event_type (see an example payload here: https://developer.paddle.com/webhooks/addresses/address-created). I can't promise I'll work on a PR for this as the scope of the changes is TBD, but I would like to have types so I may get around to submitting a PR.

[mikeseese]

This is an extensive change and I don't have the time to provide a full PR. I'm going to opt out of using this library and manually type what I need for now.

[kossnocorp]

I published a wrapper around Paddle Billing: https://github.com/kossnocorp/paddle-billing. Enjoy 😉