feat: update to latest dag-pb.DAGNode API

[daviddias]

No description provided.

[dignifiedquire]

You can make this a bit nicer,

let nodes = []

async.map([
  'I am 1',
  'I am 2'
  ' I am 3'
], (data, cb) => dagPB.DAGNode.create(new Buffer(data), cb), (err, _nodes) => {
  expect(err).to.not.exist
  nodes = _nodes
  done()
})

[victorb]

also, instead of expect(err).to.not.exist you can pass in err into done() and if it's falsy, test will pass, if truthy it will fail.

[daviddias]

@victorbjelkholm true, in an example where the only other thing that happens is an assignment, that would be ok, but if there was more operations between that expect(err) and done, other operations would fail and the error would have the right information for debugging, which would not get printed due to the operations in between failing. For the sake of consistency (check for the error first thing), I keep doing it this way.