chore(package): update async to version 2.0.0
chore(package): update async to version 2.0.0

https://greenkeeper.io/
actionhero/actionhero,witem/actionhero,gcoonrod/actionhero,gcoonrod/actionhero,S3bb1/actionhero,chimmelb/actionhero,S3bb1/actionhero,witem/actionhero,witem/actionhero,actionhero/actionhero,gcoonrod/actionhero,actionhero/actionhero,crrobinson14/actionhero,witem/actionhero,crrobinson14/actionhero,chimmelb/actionhero,actionhero/actionhero,gcoonrod/actionhero,S3bb1/actionhero,crrobinson14/actionhero,chimmelb/actionhero