Do not append carriage return

[divinity666]

Thanks a lot for providing this nice tool!

I want to use it to test my own open source project windows executable with it, as it's easy to use and provides everything I need. I just came across the issue, that the tool automatically appends a carriage return to the when calls:

judo/src/executor.js

Line 90 in c1fbbd5

childInputWrite = whenStep.response + '\r';

This is unfortunate, as this is depending on operating systems and application expectations.

I would propose to introduce a command line option, which allows to specify the line ending used in when. To keep backward compatibility, this could by default be \r, but should allow to configure nothing or \n or anything else.

What do you think about this?