minor #262 Update phpstan/phpstan-phpunit requirement from 1.1.1 to 1…

….4.0 (dependabot[bot], GSadee)

This PR was merged into the 2.1 branch.

Discussion
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Updates the requirements on [phpstan/phpstan-phpunit](https://github.com/phpstan/phpstan-phpunit) to permit the latest version.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a href="https://github.com/phpstan/phpstan-phpunit/releases">phpstan/phpstan-phpunit's releases</a>.</em></p>
<blockquote>
<h2>1.4.0</h2>
<ul>
<li><a href="http://github.com/phpstan/phpstan-phpunit/commit/f3ea021866f4263f07ca3636bf22c64be9610c11">f3ea021</a> - Update lock-closed-issues.yml</li>
<li><a href="http://github.com/phpstan/phpstan-phpunit/commit/f93aec74624bcdb9773da40a729f111df1f6e22a">f93aec7</a> - Merge remote-tracking branch 'origin/1.3.x' into 1.4.x</li>
<li><a href="http://github.com/phpstan/phpstan-phpunit/commit/77bdf9644e105833f810eefc3d6e051ac33dd939">77bdf96</a> - Update metcalfc/changelog-generator action to v4.3.1</li>
<li><a href="http://github.com/phpstan/phpstan-phpunit/commit/6a1df9a11edc5642f4a3b462fd1bcb7b07bafa35">6a1df9a</a> - Update cbrgm/mastodon-github-action action to v2</li>
<li><a href="http://github.com/phpstan/phpstan-phpunit/commit/e95a58baebb1f2daf7067c3667bff371b202151d">e95a58b</a> - Update metcalfc/changelog-generator action to v4.2.0</li>
<li><a href="http://github.com/phpstan/phpstan-phpunit/commit/77345df14f04d05252c8b13a5b4444eacd6a0764">77345df</a> - Update dessant/lock-threads action to v5</li>
<li><a href="http://github.com/phpstan/phpstan-phpunit/commit/99bb21e6ead1df1c6b9ec2b5750804a00aa6fb08">99bb21e</a> - Merge branch '1.3.x' into 1.4.x</li>
<li><a href="http://github.com/phpstan/phpstan-phpunit/commit/ac8ea9981675cb991b7bbcde55add4b73dc7c690">ac8ea99</a> - Update actions/checkout action to v4</li>
<li><a href="http://github.com/phpstan/phpstan-phpunit/commit/529f300b5bf38a5ca83617b162ffd58c8c6f5647">529f300</a> - Merge branch '1.3.x' into 1.4.x</li>
<li><a href="http://github.com/phpstan/phpstan-phpunit/commit/62e883ea3762a31faa4f6609c20fb1363762d4e3">62e883e</a> - Open 1.4.x-dev</li>
<li><a href="http://github.com/phpstan/phpstan-phpunit/commit/97ec1d34e9eb2669df4de20e0eb9d6a99f92b4d6">97ec1d3</a> - Merge branch '1.3.x' into 1.4.x</li>
<li><a href="http://github.com/phpstan/phpstan-phpunit/commit/4d99a7d020727a2c7b4b428aecbe6a0171bb78a5">4d99a7d</a> - Require PHPStan 1.11</li>
<li><a href="http://github.com/phpstan/phpstan-phpunit/commit/908e232dab1297e5ad6e492b5dfa2d828727915d">908e232</a> - Error identifiers</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="https://github.com/phpstan/phpstan-phpunit/commit/f3ea021866f4263f07ca3636bf22c64be9610c11"><code>f3ea021</code></a> Update lock-closed-issues.yml</li>
<li><a href="https://github.com/phpstan/phpstan-phpunit/commit/f93aec74624bcdb9773da40a729f111df1f6e22a"><code>f93aec7</code></a> Merge remote-tracking branch 'origin/1.3.x' into 1.4.x</li>
<li><a href="https://github.com/phpstan/phpstan-phpunit/commit/d5242a59d035e46774f2e634b374bc39ff62cb95"><code>d5242a5</code></a> Narrow type on assertCount and assertNotCount</li>
<li><a href="https://github.com/phpstan/phpstan-phpunit/commit/77bdf9644e105833f810eefc3d6e051ac33dd939"><code>77bdf96</code></a> Update metcalfc/changelog-generator action to v4.3.1</li>
<li><a href="https://github.com/phpstan/phpstan-phpunit/commit/6a1df9a11edc5642f4a3b462fd1bcb7b07bafa35"><code>6a1df9a</code></a> Update cbrgm/mastodon-github-action action to v2</li>
<li><a href="https://github.com/phpstan/phpstan-phpunit/commit/e95a58baebb1f2daf7067c3667bff371b202151d"><code>e95a58b</code></a> Update metcalfc/changelog-generator action to v4.2.0</li>
<li><a href="https://github.com/phpstan/phpstan-phpunit/commit/77345df14f04d05252c8b13a5b4444eacd6a0764"><code>77345df</code></a> Update dessant/lock-threads action to v5</li>
<li><a href="https://github.com/phpstan/phpstan-phpunit/commit/99bb21e6ead1df1c6b9ec2b5750804a00aa6fb08"><code>99bb21e</code></a> Merge branch '1.3.x' into 1.4.x</li>
<li><a href="https://github.com/phpstan/phpstan-phpunit/commit/70ecacc64fe8090d8d2a33db5a51fe8e88acd93a"><code>70ecacc</code></a> AssertTypeSpecifyingExtensionHelper: rootExpr with unknown variable to avoid ...</li>
<li><a href="https://github.com/phpstan/phpstan-phpunit/commit/ac8ea9981675cb991b7bbcde55add4b73dc7c690"><code>ac8ea99</code></a> Update actions/checkout action to v4</li>
<li>Additional commits viewable in <a href="https://github.com/phpstan/phpstan-phpunit/compare/1.1.1...1.4.0">compare view</a></li>
</ul>
</details>
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</details>

Commits
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ab21af3 Update phpstan/phpstan-phpunit requirement from 1.1.1 to 1.4.0
3c86d2f Merge branch '2.1' into dependabot/composer/phpstan/phpstan-phpunit-1.4.0

composer.json

@@ -41,7 +41,7 @@
         "matthiasnoback/symfony-dependency-injection-test": "^5.0",
         "phpspec/phpspec": "^7.0",
         "phpstan/phpstan": "1.12.4",
-        "phpstan/phpstan-phpunit": "1.1.1",
+        "phpstan/phpstan-phpunit": "1.4.0",
         "phpstan/phpstan-webmozart-assert": "1.2.0",
         "phpunit/phpunit": "^10.5",
         "rector/rector": "^0.13.6",