Bump version to v0.6

[Gnimuc]

Hey @dourouc05, are you still using this package? @francescoalemanno have made some improvements in PR #15. I just want to make sure this new release won't break your code. :)

[dourouc05]

Thank you for thinking of me :)! Yes, I still use it, albeit performance is now slightly less relevant for me. I think it will break my code, though, but I have to test it.

Just about the deprecation: I'm not sure

Hungarian.jl/src/Munkres.jl

Line 1 in 73b70bc

@deprecate munkres!(costMat::AbstractMatrix{<:Real}) munkres(costMat::AbstractMatrix{<:Real})

is enough, as the mutating method is replaced by a nonmutating one, it's not a simple function call (the function call should be replaced by a variable assignment).

[francescoalemanno]

if you guys need an imitation of the old mutating method it suffices to:

1. from each row where there is an assigned position (a starred zero), subtract from the row the cost of that position
2. for each column subtract the minimum of the column
3. go to step 1, until no changes

this algorithm given the optimal assignments and the cost matrix will produce the mutated matrix of the munkres algorithm

[dourouc05]

On my side, just removing the ! worked (no deprecation warning, no behaviour change as per my test suite). I'll just be waiting for the new version to be tagged so I can do so on my package :)!

[Gnimuc]

I dropped munkres! on this release and mentioned #16 (comment) in the commit log. Anyway, it's not hard to find the proper fix in this small package when the code is broken.