README: change multiple-method listener syntax
README: change multiple-method listener syntax

Ribesg/anko,JetBrains/anko,colriot/anko,DanielGrech/anko,Kotlin/anko,JetBrains/anko,DanielGrech/anko,leasual/anko,colriot/anko,mr-max/anko,fboldog/anko,snice/anko,colriot/anko,mr-max/anko,JetBrains/anko,Ribesg/anko,fboldog/anko,Kotlin/anko,fboldog/anko,snice/anko,Ribesg/anko,is00hcw/anko,DanielGrech/anko,leasual/anko,snice/anko,is00hcw/anko,deva666/anko,leasual/anko,mr-max/anko,deva666/anko,Kotlin/anko,is00hcw/anko,deva666/anko