chore(deps): bump fastjsonschema from 2.15.1 to 2.15.2 (#891)

Bumps [fastjsonschema](https://github.com/seznam/python-fastjsonschema) from 2.15.1 to 2.15.2.
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a href="https://github.com/horejsek/python-fastjsonschema/blob/master/CHANGELOG.txt">fastjsonschema's changelog</a>.</em></p>
<blockquote>
<p>=== 2.15.2 (2021-12-12)</p>
<ul>
<li>Fix nested oneOf and anyOf</li>
<li>Fix if-else block in anyOf block</li>
<li>Fix uniqueItems including lists or dicts</li>
<li>Add option to pass custom formats in generated code</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="https://github.com/horejsek/python-fastjsonschema/commit/ce8603ba29b719d76afc4fb221328cc80b130b0b"><code>ce8603b</code></a> v2.15.2</li>
<li><a href="https://github.com/horejsek/python-fastjsonschema/commit/8464e1c61eb9aebca9ba5153b9f7270d55c95271"><code>8464e1c</code></a> Merge pull request <a href="https://github-redirect.dependabot.com/seznam/python-fastjsonschema/issues/112">#112</a> from hh-h/fix-107</li>
<li><a href="https://github.com/horejsek/python-fastjsonschema/commit/aec5afd95288cac5305f5219bf7ffa8217fcef13"><code>aec5afd</code></a> Fix if-else in onyOf block</li>
<li><a href="https://github.com/horejsek/python-fastjsonschema/commit/cd1f06e23cc4756a9a60bb64545e93dfb7b4336f"><code>cd1f06e</code></a> Merge pull request <a href="https://github-redirect.dependabot.com/seznam/python-fastjsonschema/issues/126">#126</a> from abravalheri/add-custom-formats-arg</li>
<li><a href="https://github.com/horejsek/python-fastjsonschema/commit/d4a5eb2cda2c523849bfba3e828bea5fc16f2ff4"><code>d4a5eb2</code></a> Fix nested oneOf and anyOf</li>
<li><a href="https://github.com/horejsek/python-fastjsonschema/commit/7e01c7bc7ac816cca826300a1c1bc873242c9ae4"><code>7e01c7b</code></a> Add <code>custom_formats</code> parameter when validating $ref</li>
<li><a href="https://github.com/horejsek/python-fastjsonschema/commit/1a549722fa55b4519492f03c85d577aa9c17bf09"><code>1a54972</code></a> Add 'custom_formats' argument to generated code</li>
<li><a href="https://github.com/horejsek/python-fastjsonschema/commit/b5b7cbabbb7218589ac6f386e6438f39c6557e73"><code>b5b7cba</code></a> resolving uniqueItems is stable now</li>
<li>See full diff in <a href="https://github.com/seznam/python-fastjsonschema/compare/v2.15.1...v2.15.2">compare view</a></li>
</ul>
</details>
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