chore(deps): update dependency xunit.runner.visualstudio to v3

Author: renovate[bot]

src/2015/AdventOfCode.2015.Puzzles.Test/AdventOfCode.2015.Puzzles.Test.csproj

@@ -10,7 +10,7 @@
   <ItemGroup Label="Package References">
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.14.1" />
     <PackageReference Include="xunit" Version="2.4.2" />
-    <PackageReference Include="xunit.runner.visualstudio" Version="2.4.5">
+    <PackageReference Include="xunit.runner.visualstudio" Version="3.1.1">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
       <PrivateAssets>all</PrivateAssets>
     </PackageReference>

src/2020/AdventOfCode.2020.Puzzles.Test/AdventOfCode.2020.Puzzles.Test.csproj

@@ -9,7 +9,7 @@
   <ItemGroup Label="Package References">
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.14.1" />
     <PackageReference Include="xunit" Version="2.4.2" />
-    <PackageReference Include="xunit.runner.visualstudio" Version="2.4.5">
+    <PackageReference Include="xunit.runner.visualstudio" Version="3.1.1">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
       <PrivateAssets>all</PrivateAssets>
     </PackageReference>