Bump flat-cache from 3.1.1 to 3.2.0 (#9)

Bumps [flat-cache](https://github.com/jaredwray/flat-cache) from 3.1.1
to 3.2.0.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/jaredwray/flat-cache/releases">flat-cache's
releases</a>.</em></p>
<blockquote>
<h2>v3.2.0</h2>
<h2>What's Changed</h2>
<ul>
<li>[Fix] restore node 10 compat by <a
href="https://github.com/ljharb"><code>@​ljharb</code></a> in <a
href="https://redirect.github.com/jaredwray/flat-cache/pull/81">jaredwray/flat-cache#81</a></li>
</ul>
<h2>New Contributors</h2>
<ul>
<li><a href="https://github.com/ljharb"><code>@​ljharb</code></a> made
their first contribution in <a
href="https://redirect.github.com/jaredwray/flat-cache/pull/81">jaredwray/flat-cache#81</a></li>
</ul>
<p><strong>Full Changelog</strong>: <a
href="https://github.com/jaredwray/flat-cache/compare/v3.1.1...v3.2.0">https://github.com/jaredwray/flat-cache/compare/v3.1.1...v3.2.0</a></p>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/jaredwray/flat-cache/commit/7cf46311b7073c8d33da933bbb23f9284b71ddd4"><code>7cf4631</code></a>
version bump to v3.2.0</li>
<li><a
href="https://github.com/jaredwray/flat-cache/commit/0672ca077470bbe88444996a49d7bce2d7d2f82a"><code>0672ca0</code></a>
Merge pull request <a
href="https://redirect.github.com/jaredwray/flat-cache/issues/81">#81</a>
from ljharb/engines</li>
<li><a
href="https://github.com/jaredwray/flat-cache/commit/cf97253f2b658f382e603ac9ec2270b81d01b2dc"><code>cf97253</code></a>
[Fix] restore node 10 compat</li>
<li>See full diff in <a
href="https://github.com/jaredwray/flat-cache/compare/v3.1.1...v3.2.0">compare
view</a></li>
</ul>
</details>
<br />


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