Update Async generator to 0.8.2.12
Update Async generator to 0.8.2.12

This fix the generation bug which previously had to be reverted after
each generation, see maca88/AsyncGenerator#133.

RogerKratz/nhibernate-core,gliljas/nhibernate-core,hazzik/nhibernate-core,hazzik/nhibernate-core,ngbrown/nhibernate-core,gliljas/nhibernate-core,fredericDelaporte/nhibernate-core,nhibernate/nhibernate-core,gliljas/nhibernate-core,fredericDelaporte/nhibernate-core,fredericDelaporte/nhibernate-core,fredericDelaporte/nhibernate-core,ngbrown/nhibernate-core,nhibernate/nhibernate-core,RogerKratz/nhibernate-core,hazzik/nhibernate-core,RogerKratz/nhibernate-core,nhibernate/nhibernate-core,ngbrown/nhibernate-core,gliljas/nhibernate-core,nhibernate/nhibernate-core,RogerKratz/nhibernate-core,hazzik/nhibernate-core