Update xunit and its dependabot configuration

Author: lg2de

.github/dependabot.yml

@@ -4,3 +4,7 @@ updates:
     directory: "/"
     schedule:
       interval: "daily"
+    groups:
+      xunit:
+        patterns:
+          - "xunit*"

tests/SimpleAccounting.IntegrationTests/SimpleAccounting.IntegrationTests.csproj

@@ -13,8 +13,8 @@
     <!-- license is BSD-3-Clause -->
     <PackageReference Include="NSubstitute" Version="5.1.0"/>
     <!-- license is apache 2.0 -->
-    <PackageReference Include="xunit" Version="2.6.3" />
-    <PackageReference Include="xunit.runner.visualstudio" Version="2.5.5">
+    <PackageReference Include="xunit" Version="2.6.4"/>
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.5.6">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
     </PackageReference>

tests/SimpleAccounting.UnitTests/SimpleAccounting.UnitTests.csproj

@@ -17,8 +17,8 @@
     <!-- license is BSD-3-Clause -->
     <PackageReference Include="NSubstitute" Version="5.1.0" />
     <!-- license is apache 2.0 -->
-    <PackageReference Include="xunit" Version="2.6.3" />
-    <PackageReference Include="xunit.runner.visualstudio" Version="2.5.5">
+    <PackageReference Include="xunit" Version="2.6.4"/>
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.5.6">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
     </PackageReference>