Auto merge of #2747 - rust-lang:renovate/ember-test-selectors-5.x, r=Turbo87

Update dependency ember-test-selectors to v5

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [ember-test-selectors](https://togithub.com/simplabs/ember-test-selectors) | devDependencies | major | [`4.1.0` -> `5.0.0`](https://renovatebot.com/diffs/npm/ember-test-selectors/4.1.0/5.0.0) |

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### Release Notes

<details>
<summary>simplabs/ember-test-selectors</summary>

### [`v5.0.0`](https://togithub.com/simplabs/ember-test-selectors/blob/master/CHANGELOG.md#v500-2020-09-02)

[Compare Source](https://togithub.com/simplabs/ember-test-selectors/compare/v4.1.0...v5.0.0)

This release drops support for Ember.js versions below v3.8 due to an update
of ember-cli-htmlbars which did the same. Other than that, no further breaking
changes are contained in the release.

##### 💥 Breaking Change

-   [#&#8203;527](https://togithub.com/simplabs/ember-test-selectors/pull/527) Bump ember-cli-htmlbars from 4.3.1 to 5.1.2 ([@&#8203;marcoow](https://togithub.com/marcoow))

##### 🚀 Enhancement

-   [#&#8203;587](https://togithub.com/simplabs/ember-test-selectors/pull/587) bind-data-test-attributes: Avoid deprecated `getWithDefault()` call ([@&#8203;Turbo87](https://togithub.com/Turbo87))

##### 📝 Documentation

-   [#&#8203;588](https://togithub.com/simplabs/ember-test-selectors/pull/588) Update Node.js and Ember.js support documentation ([@&#8203;Turbo87](https://togithub.com/Turbo87))

##### Committers: 2

-   Marco Otte-Witte ([@&#8203;marcoow](https://togithub.com/marcoow))
-   Tobias Bieniek ([@&#8203;Turbo87](https://togithub.com/Turbo87))

</details>

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Author: bors

package-lock.json

@@ -91,7 +91,7 @@
     "ember-source": "3.20.3",
     "ember-svg-jar": "2.2.3",
     "ember-template-lint": "2.11.0",
-    "ember-test-selectors": "4.1.0",
+    "ember-test-selectors": "5.0.0",
     "ember-truth-helpers": "2.1.0",
     "ember-web-app": "4.0.0",
     "ember-window-mock": "0.7.1",