• fix(orderedReducer): LISTENER_RESPONSE and DOCUMENT_REMOVED actions
  correctly updating state for sub-collections
• feat(tests): tests added for success callback and error callback arguments of setListener method
• fix(core): only copy public methods from firebase.firestore() instance - #93, #108
• fix(actions): runTransaction no longer failing - #108
• fix(orderedReducer): empty listener response correctly updates state when using storeAs
• fix(orderedReducer): fix merge setting (merge.collection to merge.collections) - @danleavitt0
• feat(actions): attempting to delete sub collection at any level throw (previously only top level)
• feat(tests): Add tests for success and error callbacks of setListener
• fix(orderedReducer): return state directly for non-matching action types
• fix(deps): lock prettier version to 1.10.0 (prevents build fail on Travis)