Added sanitize optional parameter to minimize()

[MrJake222]

Used for example for resampling in RK-EDA.

[VicentePerezSoloviev]

Thank you for pointing this out. I really think that this could be a nice improvement to the algorithm itself. I fact, other libraries such as scipy integrate a similar option. In order to accept the pull request, may I ask you to add a couple of modifications?

1. One of the main goals of the library is to implement the EDA approach the best modular and efficient possible. So, conditional sentences are a bit slow. Even more in Python. And even more if this is executed in each iteration of the algorithm. So, I see that you have added a callable argument to minimize function. I think that it could be interesting if by default callable is an empty function such as,
   def sanitize(): pass
   Then, you can always execute it, regardless it is passed by the used or not. Maybe this can be somehow checked at the beginning of the minimize function and then alway executed during the implementation.

2. The second comment is to change the name of the argument. I see, for example in scipy.minimize that they call it callback function. May I ask you to change it so users are familiarized with the name itself?

Thank you again for the nice suggestion.

[VicentePerezSoloviev]

Hi @MrJake222 are you planning to keep working on this pull request? Thank you

[MrJake222]

I've come up with my own (really simple) solution. No time to work on these now. Sorry. You can take over my code If you'd like.