make ember-cli-is-package-missing a dependency
make ember-cli-is-package-missing a dependency

(previously it was a dev dependency only)

Charizard/ember-simple-auth,clairton/ember-simple-auth,omniboard/ember-simple-auth,duggiefresh/ember-simple-auth,rmachielse/ember-simple-auth,vdveer/ember-simple-auth,Charizard/ember-simple-auth,leuprechtroman/ember-simple-auth,kylemellander/ember-simple-auth,omniboard/ember-simple-auth,simplabs/ember-simple-auth,stevenwu/ember-simple-auth,kylemellander/ember-simple-auth,dknutsen/ember-simple-auth,duggiefresh/ember-simple-auth,rmachielse/ember-simple-auth,clairton/ember-simple-auth,simplabs/ember-simple-auth,leuprechtroman/ember-simple-auth,vdveer/ember-simple-auth,dknutsen/ember-simple-auth,stevenwu/ember-simple-auth