I am trying to use set-ns-min-level! but the macro does not seem to exist? No such var: timbre/set-ns-min-level! It's mentioned here http://ptaoussanis.github.io/timbre/taoensso.timbre.html#var-set-ns-min-level.21 but I can't find it in the source https://github.com/ptaoussanis/timbre/blob/master/src/taoensso/timbre.cljc