Add's URL to allowed globals list

[evoactivity]

The URL class has several static methods that can be useful to access from a template.

An example use case is

<img src={{URL.createObjectURL file}} />

The only test I found for allowed globals is this

babel-plugin-ember-template-compilation/__tests__/tests.ts

Line 1971 in 3ca974e

describe('implements RFC#1070: default globals', function () {

Looking at that I'm not sure how something like JSON.stringify is tested since it seems to just ensure if it's in the list it will be allowed, so I don't have any tests to go along with this keeping inline with how they are currently tested.

The URL spec is here https://url.spec.whatwg.org/#url
But two extra static methods are from the file api https://w3c.github.io/FileAPI/#dfn-createObjectURL

[NullVoxPopuli]

The URL class has several static methods that can be useful to access from a template.

I feel like we should add this to the criteria. like -- we cant new a URL -- but using as a namespace makes sense -- like JSON

[NullVoxPopuli]

added here, too NullVoxPopuli/limber#1970