Process multiple short options with single dash

[kost]

If following option is enabled:
flaggy.DefaultParser.ProcessMultipleShorts = true

following multiple options : -e -x -a -m -p -l
can be written as: -exampl

Since, it breaks previous behaviour, it is added as an
option to the parser.

[integrii]

Thanks Kost. I am going to review this tonight - sorry for the delay!

I really appreciate the contribution.

[integrii]

We definitely want to get a test or two in here to validate the functionality. I would also like to see more functions and flatter code in this - that's a lot of indents to the right to consider.

I wonder if there is a way to add this functionality by default. I believe POSIX specifies that double dashes -- denotes an upcoming long flag while a single dash - denotes a short flag (or multiple short flags). We could potentially enable this and call it flaggy version 2.0.0.

How would you feel about that?

[kost]

I'm completely fine whatever you decide. Feel free to make it default or not. Also, feel free to flatter the code or test functionality.