bug(orderedReducer): deleting a sub-collection causes a TypeError

Do you want to request a feature or report a bug?
Bug

What is the current behavior? When I try to delete a doc in a sub-collection using object or string notation, I get a TypeError: Cannot read property 'map' of undefined. Although the sub-collection is deleted, my program stops.

props.firestore
        .delete({
          collection: 'teams',
          doc: 'nOAjBoHrtCY7xH0hi0Io',
          subcollections: [
            {
              collection: 'test',
              doc: 'VUnVU8MDp0uBYo9KAfnW'
            }
          ]
        })
// OR
props.firestore.delete('teams/nOAjBoHrtCY7xH0hi0Io/test/VUnVU8MDp0uBYo9KAfnW')

TypeError: Cannot read property 'map' of undefined
    at updateItemInArray (reducers.js:98)
    at Object.removeDoc (orderedReducer.js:100)
    at reducer (reducers.js:123)
    at Object.orderedReducer [as ordered] (orderedReducer.js:196)
    at reducers.js:54
    at Array.reduce (<anonymous>)
    at reducers.js:53
    at index.js:26
    at Array.reduce (<anonymous>)
    at push../node_modules/reduce-reducers/es/index.js.__webpack_exports__.default (index.js:25)
    at combination (redux.js:446)
    at p (<anonymous>:1:36402)
    at v (<anonymous>:1:36684)
    at <anonymous>:1:40069
    at Object.dispatch (redux.js:205)
    at e (<anonymous>:1:40553)
    at actions.js:69

Which versions of dependencies, and which browser are affected by this issue? Did this work in previous versions or setups?

"react-redux-firebase": "^2.2.6",
"redux-firestore": "^0.6.1"

Demo: https://codesandbox.io/s/8k8l7no240

[prescottprue]

@Wgil Always open to help and PRs! The alpha branch contains the current progress on the work outlined in the v1.0.0 Roadmap.

So for help, things I could use:

• Testing of v1 (install through npm i --save redux-firestore@alpha)
• Input about the new API. How does it feel? Do you have any input on changes, even drastic ones, to make things easier/cleaner?
• Help improving the docs of react-redux-firebase and redux-firestore
• Help making it more clear what needs to be done and how folks should help

[Wgil]

@prescottprue Just updated the description with the link to the demo. Is there any way I can contribute with the library?