Bump thiserror from 1.0.60 to 1.0.61 (#3167)

Bumps [thiserror](https://github.com/dtolnay/thiserror) from 1.0.60 to
1.0.61.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/dtolnay/thiserror/releases">thiserror's
releases</a>.</em></p>
<blockquote>
<h2>1.0.61</h2>
<ul>
<li>Use <code>core::fmt</code> and <code>core::panic</code> to
facilitate <code>error_in_core</code> support (<a
href="https://redirect.github.com/dtolnay/thiserror/issues/299">#299</a>,
thanks <a
href="https://github.com/jordens"><code>@​jordens</code></a>)</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/dtolnay/thiserror/commit/5c8016393fec09330ae495d71edee4d8104a9466"><code>5c80163</code></a>
Release 1.0.61</li>
<li><a
href="https://github.com/dtolnay/thiserror/commit/e3b1b91ced4e590ac8823fa0945f01a0560dada9"><code>e3b1b91</code></a>
Format PR 299 with rustfmt</li>
<li><a
href="https://github.com/dtolnay/thiserror/commit/6b2b871f39cfb0a24c24d9d27b145a9fd0a6a714"><code>6b2b871</code></a>
Merge pull request <a
href="https://redirect.github.com/dtolnay/thiserror/issues/299">#299</a>
from quartiq/core</li>
<li><a
href="https://github.com/dtolnay/thiserror/commit/ce974bc2bd7773ef6e2cf19a2e35c0d31519c353"><code>ce974bc</code></a>
also {std -&gt; core}::panic::UnwindSafe</li>
<li><a
href="https://github.com/dtolnay/thiserror/commit/7b6e35b992e96581ed5feee917fdb3c2d5918839"><code>7b6e35b</code></a>
use core::fmt instead of std::fmt</li>
<li>See full diff in <a
href="https://github.com/dtolnay/thiserror/compare/1.0.60...1.0.61">compare
view</a></li>
</ul>
</details>
<br />


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