Allow Webhook class instance to be configured with java.time.Clock

[lnhrdt]

Is your feature request related to a problem? Please describe.

In our application every piece of code that references the current time uses a instance of java.time.Clock. This technique has allowed us to create a suite of reliable tests (aka not flakey tests) in a consistent way across our codebase.

com.stripe.net.Webhook makes a direct reference to java.lang.System.currentTimeMillis() which prevents us from using this technique when testing our Stripe webhook integration. I wish it were possible to create a configured instance of Webhook (perhaps in a similar way to the new StripeClient builder) passing in an instance of Clock so that we could test our Stripe webhook integration in the same way as the rest of our application.

Describe the solution you'd like

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Describe alternatives you've considered

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Additional context

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[richardm-stripe]

Hello @lnhrdt, thanks for the feedback. This seems like a reasonable request to me. I'm marking this as future as we won't be able to prioritize this right away.