Latest release

During testing, I found that the current-consumer flag is redundant, since setting the recover flag needs it to be true. So, I removed the current-consumer flag, in favor of the recover flag. Setting recover flag to true means that the current queue will be recovered on the current consumer, i.e. acker.
So far, I've tested it on Linux, feel free to test it on Windows and macOS and provide feedback if you want.

v0.0.3

This release contains the absolute basic functionality of Acker.