OP_PICK opcode with tests

[KhairallahA]

No description provided.

[tdelabro]

ditto of #44
He pushed before you so I'm closing this one.

Sorry it happened, try to coordinate with others on our tg channel

[tdelabro]

the way to make sure is to check the issues and create one for the opcode you want to add. You will easily see if someone already created the issue

[tdelabro]

actually, you created the issue before him. So I will close #44 instead

[KhairallahA]

I was surprised because I check every message on the group haha

[tdelabro]

but your PR seems to be a copy-paste of his, with the weird pickN thing he did.

I will close this one too. Can you please redo the PR without copy-pasting @supreme2580's code?

[KhairallahA]

I checked the method used in OP_OVER (#41) and saw that it is close to the implementation so it seems simpler, i just loved @supreme2580 way and used it.

created a new pr #56