clojure.core.async/alts!! fails to check when used with any keyword arguments
Description
Using alts!! as (alts!! [(chan) (chan)] riority true) or (alts!! [(chan) (chan)] riority true :default nil) fails to check, stating that an uneven number of keyword arguments were provided to the function. Removing the keyword arguments checks :ok.
Major
Using alts!! as (alts!! [(chan) (chan)]
riority true) or (alts!! [(chan) (chan)] 
riority true :default nil) fails to check, stating that an uneven number of keyword arguments were provided to the function. Removing the keyword arguments checks :ok.
See https://gist.github.com/mybuddymichael/f584ab905a4165f273e6 for the simple test case and repl output.