Merge #178

178: Bump black from 21.5b2 to 21.6b0 r=rehandalal a=dependabot[bot]

Bumps [black](https://github.com/psf/black) from 21.5b2 to 21.6b0.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a href="https://github.com/psf/black/releases">black's releases</a>.</em></p>
<blockquote>
<h2>21.6b0</h2>
<h2><em>Black</em></h2>
<ul>
<li>Fix failure caused by <code>fmt: skip</code> and indentation (<a href="https://github-redirect.dependabot.com/psf/black/issues/2281">#2281</a>)</li>
<li>Account for += assignment when deciding whether to split string (<a href="https://github-redirect.dependabot.com/psf/black/issues/2312">#2312</a>)</li>
<li>Correct max string length calculation when there are string operators (<a href="https://github-redirect.dependabot.com/psf/black/issues/2292">#2292</a>)</li>
<li>Fixed option usage when using the <code>--code</code> flag (<a href="https://github-redirect.dependabot.com/psf/black/issues/2259">#2259</a>)</li>
<li>Do not call <code>uvloop.install()</code> when <em>Black</em> is used as a library (<a href="https://github-redirect.dependabot.com/psf/black/issues/2303">#2303</a>)</li>
<li>Added <code>--required-version</code> option to require a specific version to be running (<a href="https://github-redirect.dependabot.com/psf/black/issues/2300">#2300</a>)</li>
<li>Fix incorrect custom breakpoint indices when string group contains fake f-strings
(<a href="https://github-redirect.dependabot.com/psf/black/issues/2311">#2311</a>)</li>
<li>Fix regression where <code>R</code> prefixes would be lowercased for docstrings (<a href="https://github-redirect.dependabot.com/psf/black/issues/2285">#2285</a>)</li>
<li>Fix handling of named escapes (<code>\N{...}</code>) when <code>--experimental-string-processing</code> is
used (<a href="https://github-redirect.dependabot.com/psf/black/issues/2319">#2319</a>)</li>
</ul>
</blockquote>
</details>
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a href="https://github.com/psf/black/blob/main/CHANGES.md">black's changelog</a>.</em></p>
<blockquote>
<h2>21.6b0</h2>
<h3><em>Black</em></h3>
<ul>
<li>Fix failure caused by <code>fmt: skip</code> and indentation (<a href="https://github-redirect.dependabot.com/psf/black/issues/2281">#2281</a>)</li>
<li>Account for += assignment when deciding whether to split string (<a href="https://github-redirect.dependabot.com/psf/black/issues/2312">#2312</a>)</li>
<li>Correct max string length calculation when there are string operators (<a href="https://github-redirect.dependabot.com/psf/black/issues/2292">#2292</a>)</li>
<li>Fixed option usage when using the <code>--code</code> flag (<a href="https://github-redirect.dependabot.com/psf/black/issues/2259">#2259</a>)</li>
<li>Do not call <code>uvloop.install()</code> when <em>Black</em> is used as a library (<a href="https://github-redirect.dependabot.com/psf/black/issues/2303">#2303</a>)</li>
<li>Added <code>--required-version</code> option to require a specific version to be running (<a href="https://github-redirect.dependabot.com/psf/black/issues/2300">#2300</a>)</li>
<li>Fix incorrect custom breakpoint indices when string group contains fake f-strings
(<a href="https://github-redirect.dependabot.com/psf/black/issues/2311">#2311</a>)</li>
<li>Fix regression where <code>R</code> prefixes would be lowercased for docstrings (<a href="https://github-redirect.dependabot.com/psf/black/issues/2285">#2285</a>)</li>
<li>Fix handling of named escapes (<code>\N{...}</code>) when <code>--experimental-string-processing</code> is
used (<a href="https://github-redirect.dependabot.com/psf/black/issues/2319">#2319</a>)</li>
</ul>
<h3>Integrations</h3>
<ul>
<li>The vim plugin now searches upwards from the directory containing the current buffer
instead of the current working directory for pyproject.toml. (<a href="https://github-redirect.dependabot.com/psf/black/issues/1871">#1871</a>)</li>
</ul>
<h3>Integrations</h3>
<ul>
<li>The vim plugin now reads the correct string normalization option in pyproject.toml
(<a href="https://github-redirect.dependabot.com/psf/black/issues/1869">#1869</a>)</li>
<li>The vim plugin no longer crashes Black when there's boolean values in pyproject.toml
(<a href="https://github-redirect.dependabot.com/psf/black/issues/1869">#1869</a>)</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li>See full diff in <a href="https://github.com/psf/black/commits">compare view</a></li>
</ul>
</details>
<br />


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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

requirements-lint.txt

@@ -1,3 +1,3 @@
 -r requirements-dev.txt
-black==21.5b2
+black==21.6b0
 flake8==3.9.2