babel error

[jamesdixon]

Hi,

I'm receiving the following babel error:

File: ember-holidays/lib/index.js
The Broccoli Plugin: [broccoli-persistent-filter:Babel] failed with:
TypeError: ember-holidays/lib/index.js: Property right of AssignmentExpression expected node to be of a type ["Expression"] but instead got null

Code:

/* eslint-env node */
'use strict';

var emberRollup = require('ember-rollup');
var runtimeDependencies = ['date-holidays'];

module.exports = emberRollup(runtimeDependencies, {
  name: 'ember-holidays',

  isDevelopingAddon() {
    return true;
  }
});

Running Ember CLI 2.13.0

Thanks!