does not work with mac os legacy line feed CR

[blset]

with a csv file with line separator CR (legacy mac os),
the module does not work, it cannot decode the file, it puts everything as one line and gives back only a blank list if headers true
as soon as the csv file is rewritten with line feed LF everything works as expected
this is with last stable elixir on a mac

you get legacy max os CR line separator as soon as you create the csv from excel on mac for instance

thanks

[beatrichartz]

Hi, please see #55 for some up to date info on this