chore: Bump del-cli from 3.0.1 to 4.0.0 (#285)

Bumps [del-cli](https://github.com/sindresorhus/del-cli) from 3.0.1 to 4.0.0.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a href="https://github.com/sindresorhus/del-cli/releases">del-cli's releases</a>.</em></p>
<blockquote>
<h2>v4.0.0</h2>
<h3>Breaking</h3>
<ul>
<li>Require Node.js 12 4c65d87</li>
</ul>
<h3>Improvements</h3>
<ul>
<li>Upgrade dependencies  4c65d87</li>
</ul>
<p><a href="https://github.com/sindresorhus/del-cli/compare/v3.0.1...v4.0.0">https://github.com/sindresorhus/del-cli/compare/v3.0.1...v4.0.0</a></p>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="https://github.com/sindresorhus/del-cli/commit/bbab826d7dcc592beb9b84c2d6b5189c88aea0e5"><code>bbab826</code></a> 4.0.0</li>
<li><a href="https://github.com/sindresorhus/del-cli/commit/4c65d87c803b720acefe009fff0503717c65ee85"><code>4c65d87</code></a> Require Node.js 12 and upgrade dependencies</li>
<li><a href="https://github.com/sindresorhus/del-cli/commit/66d9ed252fa047f37619ea80cb75c253df03454a"><code>66d9ed2</code></a> Move to GitHub Actions (<a href="https://github-redirect.dependabot.com/sindresorhus/del-cli/issues/20">#20</a>)</li>
<li><a href="https://github.com/sindresorhus/del-cli/commit/5ceb4e9fdbb9eefaef07f3b528cbb809e46f7eea"><code>5ceb4e9</code></a> Minor tweaks</li>
<li><a href="https://github.com/sindresorhus/del-cli/commit/7c72385ac44a413fd4e6bf8984158825a6db2a3e"><code>7c72385</code></a> Readme tweaks (<a href="https://github-redirect.dependabot.com/sindresorhus/del-cli/issues/17">#17</a>)</li>
<li>See full diff in <a href="https://github.com/sindresorhus/del-cli/compare/v3.0.1...v4.0.0">compare view</a></li>
</ul>
</details>
<br />


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