Deprecated functions

[Maxximiliann]

$ mix deps.compile
===> Analyzing applications...
===> Compiling erlport
==> export
Compiling 4 files (.ex)
warning: Atom.to_char_list/1 is deprecated. Use Atom.to_charlist/1 instead
  lib/export/helpers.ex:9: Export.Helpers.convert_options/1

warning: String.to_char_list/1 is deprecated. Use String.to_charlist/1 instead
Found at 2 locations:
  lib/export/helpers.ex:9: Export.Helpers.convert_options/1
  lib/export/helpers.ex:12: Export.Helpers.convert_options/1

Generated export app

[tcitworld]

It was fixed in 3bfabf6, so this is pretty much #10