fix: register without using Ember global (fix miguelcobain#1202)

See also:

* emberjs/ember.js#19705
* mainmatter/ember-simple-auth#2309
* https://github.com/emberjs/ember-inspector/blob/33b61245f6bef7adca44c262957bb171580fab9e/skeletons/web-extension/scripts/in-page-script.js#L30-L36
* https://guides.emberjs.com/release/ember-inspector/info/

index.js

@@ -464,7 +464,13 @@ module.exports = {
 
     let versionTree = writeFile(
       'ember-paper/register-version.js',
-      `Ember.libraries.register('Ember Paper', '${version}');`
+      `let emberLibraries;
+try {
+  emberLibraries = requireModule('ember')['default'].libraries;
+} catch {
+  emberLibraries = window.Ember.libraries;
+}
+emberLibraries?.register('Ember Paper', '${version}');`
     );
 
     let hammerJs = fastbootTransform(new Funnel(this.pathBase('hammerjs'), {