chore(package): update async to version 2.2.0
chore(package): update async to version 2.2.0

https://greenkeeper.io/
danielmahon/keystone,danielmahon/keystone,frontyard/keystone,naustudio/keystone,benkroeger/keystone,andrewlinfoot/keystone,benkroeger/keystone,trentmillar/keystone,frontyard/keystone,ratecity/keystone,concoursbyappointment/keystoneRedux,vokal/keystone,naustudio/keystone,vokal/keystone,matthewstyers/keystone,matthewstyers/keystone,frontyard/keystone,vokal/keystone,concoursbyappointment/keystoneRedux,trentmillar/keystone,danielmahon/keystone,Pop-Code/keystone,ratecity/keystone,Pop-Code/keystone,benkroeger/keystone,matthewstyers/keystone,andrewlinfoot/keystone,naustudio/keystone,andrewlinfoot/keystone,trentmillar/keystone