set coffeescript version to meinimize unexpected js compilation differences
set coffeescript version to meinimize unexpected js compilation differences

twalpole/poltergeist,teampoltergeist/poltergeist,afn/poltergeist,twalpole/poltergeist,twalpole/poltergeist,teampoltergeist/poltergeist,twalpole/poltergeist,afn/poltergeist,afn/poltergeist,afn/poltergeist,teampoltergeist/poltergeist,teampoltergeist/poltergeist