Add option for strong vs weak condorcet cycles into pwcg

[peterrrock2]

Currently the get_condorcet_cycles function only checks for weak condorcet cycles (ties allowed). We should add a parameter that checks for strict cycles

[hayan-gh]

Hi @peterrrock2 , I would like to work on this issue, I've reviewed the current get_condorcet_cycles implementation and I'll add a strict parameter to allow filtering out ties. Please assign it to me.

[peterrrock2]

@hayan-gh Sure, if you would like to work on this, then go right ahead!

[hayan-gh]

Thanks, @peterrrock2 I've just submitted PR #330 which adds the strict parameter. Let me know if you need any further changes.

[peterrrock2]

Fixed in #330