Object.assign is not supported in IE11

[hmajoros]

Exact Line of Code:

data/addon/-record-data-private/system/model/internal-model.js

Line 288 in d416015

Object.assign(createOptions, additionalCreateOptions);

This problem typically can be solved by using the Ember built in polyfill for Object.assign: Ember.assign:

import { assign } from '@ember/polyfills';
...

assign(createOptions, additionalCreateOptions);

Reference: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/assign

[rwjblue]

IMHO, we should fix this via babel.

Specifically:

• Add babel-plugin-transform-object-assign
• Add something like this to ensure that Ember.assign is used as the provided helper.

[rwjblue]

Looks like this was fixed in #5549