Account for buffered events in dispatchers #312
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I updated the demand & partition dispatchers to account for the buffered events by adding an additional
buffer_sizeparameter to theaskfunction. Therefore, if there are events in the buffer, they will be asked for. This solves the issue that happens when the producer buffers some events (because there are no consumers available), and then the consumers come back live. Previously the buffered events weren't sent because they were considered "already sent". Refer to the issue for the details of how the behavior reproduced: #311