Parsing does not work on Windows with CRLF line endings

[Akash Vibhute]

The parse contents function only splits the content with \n---\n, so when creating posts on a windows machine which defaults to CRLF, this throws parsing error even if --- separator is available. It works as expected when file is changed to LF.

Should this be updated to support windows line endings? This should only be a problem in development (which can be fixed by updating the files) as most projects using this library will get deployed on Unix. If not, a note in the readme/doc will be helpful.

defp parse_contents(path, contents) do
    case :binary.split(contents, "\n---\n") do
      [_] ->
        {:error, "could not find separator --- in #{inspect(path)}"}
     ...
    end
  end