Support CloudFlare workers #217
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This fixes a regression introduced with #214 where we were not exiting correctly when getting the `"done"` event from the server. This was picked up by the introduction of the CloudFlare integration tests added in #217 which uses the streaming API. Once the fix was added it turns out that the `nock()` tests were incorrectly passing due to some internal weirdness when using `respondWith` and a `Readable` object. I wasn't able to get this working without hitting a different error: TypeError: Invalid state: Controller is already closed It looks like nock is retaining some global state somewhere in it's implementation and streams are being retained across requests. No combination of resetting mocks seemed to fix it. In the end I just mocked out the fetch function passed into the `createReadableStream` library and returned a `Response`. I think we should probably do this everywhere rather than use `nock()` as the Request/Response APIs provided by fetch are much better now than the old node http lib.
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This PR adds support for CloudFlare worker environments. The main changes required were removing the use of the
Buffertype in favor of it's underlying typeTypedArraywhich is cross platform. And gating access to theprocessvariable which is not available outside of Node.The integration tests have been updated to successfully run the canary model against Replicate and verify the streamed results.