Updating onAllData to stream results

TodosContainer.js

import Utils from '../utils';
...

export default class TodosContainer extends React.Component {
  ...
  onAllData = (todos, streamData) => {
    // merge streaming todos data along with current todos
    const todosData = Utils.mergeTodos(todos, streamData);

    // filter data based on "screen": [All | Active | Completed]
    const filteredData = this.filterTodosData(todosData);

    return (
      <FlatList
        style={{ width: '100%', top: 15 }}
        data={filteredData}
        keyExtractor={item => item._id}
        renderItem={({ item: todo }) => (
            <TodoItem todo={todo} onUpdate={this.api.update} onDelete={this.api.destroy} />
        )}
      />
    );
  };
  ...
}