Add AsyncSeq.mapAsyncUnorderedParallel

[Xyncgas]

I implemented mapAsyncUnorderedParallel Can someone please help me to add it into the AsyncSeq library we are using

[Xyncgas]

My first contribution

[Xyncgas]

#155

[dsyme]

@Xyncgas I left some initial comments - we'd need tests too. Any reason this doesn't go direct into the main library?

[Xyncgas]

@Xyncgas I left some initial comments - we'd need tests too. Any reason this doesn't go direct into the main library?

I didn't want to put stuff into the folder but created a separate one because I didn't know what to do

[dsyme]

@abelbraaksma Should we close this old one out?

[Xyncgas]

I'm willing to create a good solution for adding the method as a part of the library But I do not test anything I write so if tests are required I do not know how to do it