Cancel upload about upchunk

[mmcc]

Just merged #61 which adds a note about abort and describes how cancellation works.

Thanks for the heads up.

[mmcc]

pause will typically do what you want, but looks like abort never made it onto the readme! abort pauses the upload, but also cancels the current, in-flight request.

Is there something else you're looking for around cancellation?

[phuclh]

Thank you for the quick support 👯