Merge pull request #22 from xflagstudio/update-elixir

update Elixir to 1.9.1

Author: enerick

Dockerfile

@@ -2,7 +2,7 @@ FROM amazonlinux:1
 
 ENV LANG en_US.UTF-8
 
-ENV ELIXIR_VERSION "1.9.0-otp-22"
+ENV ELIXIR_VERSION "1.9.1-otp-22"
 ENV ERLANG_VERSION "22.0"
 ENV ASDF_VERSION   "v0.5.1"
 ENV ASDF_DIR /opt/asdf