Auto merge of #2509 - rust-lang:dependabot/npm_and_yarn/ember-a11y-testing-3.0.0, r=Turbo87

Bump ember-a11y-testing from 2.0.0 to 3.0.0

Bumps [ember-a11y-testing](https://github.com/ember-a11y/ember-a11y-testing) from 2.0.0 to 3.0.0.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a href="https://github.com/ember-a11y/ember-a11y-testing/releases">ember-a11y-testing's releases</a>.</em></p>
<blockquote>
<h2>3.0.0</h2>
<ul>
<li>Drops support for Ember 2.18 due to major dependencies</li>
<li>Drops support for Node.js v8 due to EOL</li>
<li>Update eslint</li>
<li>Update dependency ember-cli-version-checker to v5</li>
<li>Update dependency @ember/optional-features to v1</li>
<li>Update ember packages</li>
<li>Update sass</li>
<li>Update dependency ember-cli-github-pages to v0.2.2</li>
<li>Update dependency axe-core to v3.5.3</li>
<li>Update dependency ember-radio-button to v2</li>
</ul>
</blockquote>
</details>
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a href="https://github.com/ember-a11y/ember-a11y-testing/blob/master/CHANGELOG.md">ember-a11y-testing's changelog</a>.</em></p>
<blockquote>
<h1>3.0.0 / 2020-05-07</h1>
<ul>
<li>Drops support for Ember 2.18 due to major dependencies</li>
<li>Drops support for Node.js v8 due to EOL</li>
<li>Update eslint</li>
<li>Update dependency ember-cli-version-checker to v5</li>
<li>Update dependency @ember/optional-features to v1</li>
<li>Update ember packages</li>
<li>Update sass</li>
<li>Update dependency ember-cli-github-pages to v0.2.2</li>
<li>Update dependency axe-core to v3.5.3</li>
<li>Update dependency ember-radio-button to v2</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="https://github.com/ember-a11y/ember-a11y-testing/commit/d84f0fafb5fd37d67b40310592ea230ca3d5c3f1"><code>d84f0fa</code></a> Release v3.0.0</li>
<li><a href="https://github.com/ember-a11y/ember-a11y-testing/commit/9da35e03d2ee50b1c0b1848995d6fe74ec53f727"><code>9da35e0</code></a> Updates compatibility, removes deprecated dependencies, fixes readiogroup demo</li>
<li><a href="https://github.com/ember-a11y/ember-a11y-testing/commit/f67ded6769164fc1b6b6e53a705d9c2e8818908f"><code>f67ded6</code></a> Fixes ember eslint violations</li>
<li><a href="https://github.com/ember-a11y/ember-a11y-testing/commit/8318e6f7e25de1047e82a11d79ad5ad3f9ab25aa"><code>8318e6f</code></a> Update eslint</li>
<li><a href="https://github.com/ember-a11y/ember-a11y-testing/commit/5bed92c4a386daef1e01284937d394566a4b3566"><code>5bed92c</code></a> Pins broccoli-funnel at v3.0.0</li>
<li><a href="https://github.com/ember-a11y/ember-a11y-testing/commit/07fbd4c872f233022956c4b4319d4d7c0dd69dc2"><code>07fbd4c</code></a> Update ember packages</li>
<li><a href="https://github.com/ember-a11y/ember-a11y-testing/commit/fcf50324d7504958ca63780a9c2a804915b9e170"><code>fcf5032</code></a> Update dependency ember-cli-version-checker to v5</li>
<li><a href="https://github.com/ember-a11y/ember-a11y-testing/commit/62aa4ea5923b38ab37cf67c4abdca2be975aa245"><code>62aa4ea</code></a> Fix build for ember-cli-version-checker v5</li>
<li><a href="https://github.com/ember-a11y/ember-a11y-testing/commit/3f1196a7a7381376f17637518b16b0ad664f8901"><code>3f1196a</code></a> Update dependency @ember/optional-features to v1</li>
<li><a href="https://github.com/ember-a11y/ember-a11y-testing/commit/dcd1d2504d654a171bbb11b84ba7095a390d847c"><code>dcd1d25</code></a> Update ember packages</li>
<li>Additional commits viewable in <a href="https://github.com/ember-a11y/ember-a11y-testing/compare/v2.0.0...v3.0.0">compare view</a></li>
</ul>
</details>
<br />

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Author: bors