Question: hasFinalState + immutable.js = ❤️ ?

[vandriesh]

Question: any plans to expect adjust hasFinalState to consider immutable.js based state
or give a possibility to transform state
e.g.

    ...
    .hasFinalState((state) => state.getIn(['x','y]) === 'yyy)
    ...

e.g. now it looks like:

SagaTestError: 
Expected to have final store state:
-----------------------------------
Map {
  size: 1,
  _root: ArrayMapNode { ownerID: OwnerID {}, entries: [ [ 'data', [Map] ] ] },
  __ownerID: undefined,
  __hash: undefined,
  __altered: false
}

But instead had final store state:
----------------------------------
Map {
  size: 1,
  _root: ArrayMapNode { ownerID: undefined, entries: [ [ 'data', [Map] ] ] },
  __ownerID: undefined,
  __hash: undefined,
  __altered: false
}