Implement Piscina.move

[jasnell]

Example worker.js

const { move } = require('piscina');

module.exports = () => {
  // transfers the arraybuffer rather than cloning it.
  return move(new ArrayBuffer(10));
};

Fixes: #58

[mcollina]

lgtm

[addaleax]

Just fyi, I am reviewing this and I’ll have a few comments ;)

[jasnell]

I’ll have a few comments ;)

I suspected as much 😄

[jasnell]

@addaleax ... updated! :-)