Bug#869030: elixir: Please package v1.4

[Dato Simó]

retitle 869030 elixir: please package v1.6
thanks

I would also love to see an updated Elixir in Debian, particularly 
now that v1.6 is released.

If you don't have the time to do it, would you welcome some help 
in preparing the upload?

-d