Mnesia as default queue not mentioned in start_queue/2 documentation

[Zgore14]

First of all, thank you for this amazing library. It's really useful to me :100:

While reading the documentation i've noticed a inconsistency. In the README.md and in the code the Mnesia queue is the default. But ErlangQueue is still indicated as the default in the start_queue/2 function documentation :

https://github.com/koudelka/honeydew/blob/3a350934a4ac849127d5ceb177da6d541c6d03ba/lib/honeydew.ex#L346-L347

[fanzeyi]

Same. This is very confusing :/