Version bump to 2.1.6
Version bump to 2.1.6

pskrz/aasm,intfrr/aasm,artofhuman/aasm,reidmorrison/aasm,HoyaBoya/aasm,Funfun/aasm,hspazio/aasm,allspiritseve/aasm,nickpellant/aasm,yui-knk/aasm,bilby91/aasm,luxola/aasm,joshsoftware/aasm,ASnow/aasm,xieyunzi/aasm,Aryk/aasm,oswaldoferreira/aasm,aasm/aasm,internmatch/aasm,awsmsrc/aasm