chore(deps-dev): Bump aws-sdk from 2.1570.0 to 2.1571.0 (#852)

Bumps [aws-sdk](https://github.com/aws/aws-sdk-js) from 2.1570.0 to 2.1571.0.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a href="https://github.com/aws/aws-sdk-js/releases">aws-sdk's releases</a>.</em></p>
<blockquote>
<h2>Release v2.1571.0</h2>
<p>See <a href="https://github.com/aws/aws-sdk-js/blob/master/CHANGELOG.md">changelog</a> for more information.</p>
</blockquote>
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<details>
<summary>Commits</summary>
<ul>
<li><a href="https://github.com/aws/aws-sdk-js/commit/a9a6e0a5ee173c226c1cfa83fb3331476cd160cc"><code>a9a6e0a</code></a> Updates SDK to v2.1571.0</li>
<li>See full diff in <a href="https://github.com/aws/aws-sdk-js/compare/v2.1570.0...v2.1571.0">compare view</a></li>
</ul>
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