Bump xunit from 2.5.1 to 2.5.2 (#93)

Bumps [xunit](https://github.com/xunit/xunit) from 2.5.1 to 2.5.2.
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/xunit/xunit/commit/32931855e213ccb74d75a899af76f40388b2131b"><code>3293185</code></a>
v2.5.2</li>
<li><a
href="https://github.com/xunit/xunit/commit/4d9d4fcc5d5f0e09445026674f62415993a3fe73"><code>4d9d4fc</code></a>
Roll back singleton NullMessageSink and
NullSourceInformationProvider</li>
<li><a
href="https://github.com/xunit/xunit/commit/45078f3a86e04e495dbbe3e434a8dddc1ce42a8d"><code>45078f3</code></a>
Pick up latest analyzers</li>
<li><a
href="https://github.com/xunit/xunit/commit/8ae0d067bb8f427f38c5524b4f3c47f99e844f77"><code>8ae0d06</code></a>
Remove VisualStudioSourceInformationProvider and DiaSession-related
classes</li>
<li><a
href="https://github.com/xunit/xunit/commit/4a35ce7722aa3ac01a1e04fc3757c448d454aaa5"><code>4a35ce7</code></a>
Missing comparer pass-through on DictionaryExtensions</li>
<li><a
href="https://github.com/xunit/xunit/commit/9ab4ecef596b9677bcc53bdb3b5e1117b0a83bf4"><code>9ab4ece</code></a>
<a href="https://redirect.github.com/xunit/xunit/issues/2755">#2755</a>:
Tests for another embedded collection regression (v2)</li>
<li><a
href="https://github.com/xunit/xunit/commit/e499f14da33189d3c197b5f4abf3a6f769e0a80e"><code>e499f14</code></a>
Bump up to v2.5.2-pre</li>
<li>See full diff in <a
href="https://github.com/xunit/xunit/compare/2.5.1...2.5.2">compare
view</a></li>
</ul>
</details>
<br />


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IntelliTect.Multitool.Tests/IntelliTect.Multitool.Tests.csproj

@@ -10,7 +10,7 @@
   <ItemGroup>
     <PackageReference Include="Moq" Version="4.20.69" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.7.2" />
-    <PackageReference Include="xunit" Version="2.5.1" />
+    <PackageReference Include="xunit" Version="2.5.2" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.5.3">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>