minor #345 Update phpstan/phpstan-doctrine requirement from 1.3.14 to…

… 1.3.15 (dependabot[bot])

This PR was merged into the 1.12 branch.

Discussion
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Updates the requirements on [phpstan/phpstan-doctrine](https://github.com/phpstan/phpstan-doctrine) to permit the latest version.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a href="https://github.com/phpstan/phpstan-doctrine/releases">phpstan/phpstan-doctrine's releases</a>.</em></p>
<blockquote>
<h2>1.3.15</h2>
<ul>
<li><a href="http://github.com/phpstan/phpstan-doctrine/commit/93fe8c18ee955009e2033efeb64284b4e4df66a0">93fe8c1</a> - Support ReadableCollection from doctrine/collections 1.8.0</li>
<li><a href="http://github.com/phpstan/phpstan-doctrine/commit/aa483a2f397c0bf6596c8342330ea55a955ba2f7">aa483a2</a> - Update Collection TKey</li>
<li><a href="http://github.com/phpstan/phpstan-doctrine/commit/0a298f2aad598e38c093028cb86a1a7749168142">0a298f2</a> - fixes typo</li>
<li><a href="http://github.com/phpstan/phpstan-doctrine/commit/8ab46345a9da55de7d63a3c5bb03904b21b75abd">8ab4634</a> - Fix build</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="https://github.com/phpstan/phpstan-doctrine/commit/93fe8c18ee955009e2033efeb64284b4e4df66a0"><code>93fe8c1</code></a> Support ReadableCollection from doctrine/collections 1.8.0</li>
<li><a href="https://github.com/phpstan/phpstan-doctrine/commit/aa483a2f397c0bf6596c8342330ea55a955ba2f7"><code>aa483a2</code></a> Update Collection TKey</li>
<li><a href="https://github.com/phpstan/phpstan-doctrine/commit/0a298f2aad598e38c093028cb86a1a7749168142"><code>0a298f2</code></a> fixes typo</li>
<li><a href="https://github.com/phpstan/phpstan-doctrine/commit/8ab46345a9da55de7d63a3c5bb03904b21b75abd"><code>8ab4634</code></a> Fix build</li>
<li>See full diff in <a href="https://github.com/phpstan/phpstan-doctrine/compare/1.3.14...1.3.15">compare view</a></li>
</ul>
</details>
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</details>

Commits
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43caeb0 Update phpstan/phpstan-doctrine requirement from 1.3.14 to 1.3.15

composer.json

@@ -29,7 +29,7 @@
         "phpspec/phpspec": "^7.2",
         "phpstan/extension-installer": "^1.0",
         "phpstan/phpstan": "^1.8.1",
-        "phpstan/phpstan-doctrine": "1.3.14",
+        "phpstan/phpstan-doctrine": "1.3.15",
         "phpstan/phpstan-strict-rules": "^1.3.0",
         "phpstan/phpstan-webmozart-assert": "^1.2.0",
         "phpunit/phpunit": "^9.5",