Update mediawiki/mediawiki-phan-config requirement from 0.19.0 to 0.20.0 (#122)

Updates the requirements on
[mediawiki/mediawiki-phan-config](https://github.com/wikimedia/mediawiki-tools-phan)
to permit the latest version.
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/wikimedia/mediawiki-tools-phan/blob/master/HISTORY.md">mediawiki/mediawiki-phan-config's
changelog</a>.</em></p>
<blockquote>
<h2>0.20.0 / 2026-03-05</h2>
<ul>
<li>Bump phan to 6.0.2 and taint-check to 9.1.0 (Daimona Eaytoy)</li>
<li>Update exclude file regex</li>
</ul>
<h2>0.19.0 / 2026-02-09</h2>
<ul>
<li>(T406326) Bump phan to 6.0.1 and taint-check to 9.0.0 (James D.
Forrester)</li>
</ul>
<h2>0.18.0 / 2025-12-18</h2>
<ul>
<li>Bump phan to 5.5.2 and taint-check to 8.0.0 (Bartosz
Dziewoński)</li>
</ul>
<h2>0.17.0 / 2025-08-07</h2>
<ul>
<li>Drop support for PHP &lt; 8.1 (Daimona Eaytoy)</li>
<li>Re-enable infinite loop and recursion detection (Daimona
Eaytoy)</li>
<li>Bump phan to 5.5.1 and taint-check to 7.0.0 (Daimona Eaytoy)</li>
<li>Document common unchecked exceptions: <code>DOMException</code> and
<code>NormalizedException</code> (Bartosz Dziewoński)</li>
</ul>
<h2>0.16.0 / 2025-07-02</h2>
<ul>
<li>Use namespaced MediaWiki classes in <code>globals_type_map</code>
(James D. Forrester)</li>
<li>Bump minimum target PHP version to 8.1 and target PHP version to 8.4
(Daimona Eaytoy)</li>
<li>Warn against undocumented checked exception (Daimona Eaytoy)</li>
<li>Enable a subset of <code>unused_variable_detection</code> features
to flag: unused variables in <code>catch</code> and closure
<code>use</code>, unused parameters in private methods, unused static
variables.</li>
<li>Bump phan to 5.5.0 and taint-check to 6.2.1 (Daimona Eaytoy)</li>
</ul>
<h2>0.15.1 / 2025-01-09</h2>
<ul>
<li>Fixed a bug where doc-only properties were not considered as
possibly undefined.</li>
<li>Fixed a bug in PHP &gt;= 8 where redundant issets would never be
reported for properties of classes with the AllowDynamicProperties
attribute.</li>
</ul>
<h2>0.15.0 / 2024-12-09</h2>
<ul>
<li>Rename NoEmptyIfDefinedPlugin to RedundantExistenceChecksPlugin
(Daimona Eaytoy)</li>
<li>Add <code>isset()</code> checks to RedundantExistenceChecksPlugin
(Daimona Eaytoy)</li>
<li>Upgrade phan to 5.4.5 and mediawiki/phan-taint-check-plugin to 6.1.0
(James D. Forrester)</li>
<li>Update target PHP version from 8.1 to 8.3</li>
</ul>
<h2>0.14.0 / 2024-02-03</h2>
<ul>
<li>Add plugin to disallow use of <code>new Exception</code> (Daimona
Eaytoy)</li>
<li>Do not emit MediaWikiNoEmptyIfDefined for properties of classes with
the AllowDynamicProperties attribute (Daimona Eaytoy)</li>
<li>Emit MediaWikiNoEmptyIfDefined for all node types except array
element access (Daimona Eaytoy)</li>
<li>Upgrade phan to 5.4.3 and mediawiki/phan-taint-check-plugin to 6.0.0
(James D. Forrester)</li>
</ul>
<h2>0.13.0 / 2023-09-08</h2>
<ul>
<li>Add plugin to forbid <code>empty()</code> on defined variables and
properties (Daimona Eaytoy)</li>
<li>Bump phan to 5.4.2 and taint-check to 5.0.0 (Michael Große)</li>
<li>&quot;Auto discovery&quot; of namespaces of wgConf and wgRequest
(Amir Sarabadani)</li>
</ul>
<h2>0.12.1 / 2023-04-17</h2>
<ul>
<li>Enable PhanCompatibleSerializeInterfaceDeprecated
(Umherirrender)</li>
<li>Create a separate config file for libraries (Daimona Eaytoy)</li>
</ul>
<h2>0.12.0 / 2022-10-06</h2>
<ul>
<li>Avoid PhanRedefinedInheritedInterface by excluding
symfony/polyfill-php80 (Umherirrender)</li>
</ul>
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</blockquote>
<p>... (truncated)</p>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/wikimedia/mediawiki-tools-phan/commit/30f5c430fce73fd796886bab40a172a1ffb3215c"><code>30f5c43</code></a>
Release 0.20.0</li>
<li><a
href="https://github.com/wikimedia/mediawiki-tools-phan/commit/c14152c0132b98e3e2d6814434535ebcafa725c3"><code>c14152c</code></a>
Bump phan to 6.0.2 and taint-check to 9.1.0</li>
<li><a
href="https://github.com/wikimedia/mediawiki-tools-phan/commit/7aae0a17e3411a4a0cf52fce0152b350fe00424c"><code>7aae0a1</code></a>
build: Updating mediawiki/mediawiki-codesniffer to 50.0.0</li>
<li><a
href="https://github.com/wikimedia/mediawiki-tools-phan/commit/99f7de81fd6675542dc5a7a122d51278b012a11f"><code>99f7de8</code></a>
build: Update exclude file regex</li>
<li>See full diff in <a
href="https://github.com/wikimedia/mediawiki-tools-phan/compare/0.19.0...0.20.0">compare
view</a></li>
</ul>
</details>
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composer.json

@@ -18,7 +18,7 @@
 	},
 	"require-dev": {
 		"mediawiki/mediawiki-codesniffer": "50.0.0",
-		"mediawiki/mediawiki-phan-config": "0.19.0",
+		"mediawiki/mediawiki-phan-config": "0.20.0",
 		"mediawiki/minus-x": "2.0.1",
 		"php-parallel-lint/php-console-highlighter": "1.0.0",
 		"php-parallel-lint/php-parallel-lint": "1.4.0"