Update xunit and StyleCop.

Author: bgrainger

.editorconfig

@@ -88,8 +88,6 @@ dotnet_diagnostic.IDE0065.severity = error # Using directives must be placed out
 dotnet_diagnostic.SA1003.severity = none # Operator must not be followed by whitespace.
 dotnet_diagnostic.SA1008.severity = none # Opening parenthesis must not be preceded by a space.
 dotnet_diagnostic.SA1009.severity = none # Closing parenthesis must not be followed by a space.
-dotnet_diagnostic.SA1010.severity = silent # https://github.com/DotNetAnalyzers/StyleCopAnalyzers/issues/3503
-dotnet_diagnostic.SA1011.severity = silent # https://github.com/DotNetAnalyzers/StyleCopAnalyzers/issues/3503
 dotnet_diagnostic.SA1027.severity = none # Tabs must not be used.
 dotnet_diagnostic.SA1101.severity = none # Prefix local calls with this.
 dotnet_diagnostic.SA1116.severity = none # Split parameters should start on line after declaration.

Directory.Packages.props

@@ -19,11 +19,11 @@
     <PackageVersion Include="MySql.Data" Version="8.2.0" />
     <PackageVersion Include="NLog" Version="4.5.0" />
     <PackageVersion Include="Serilog" Version="2.6.0" />
-    <PackageVersion Include="StyleCop.Analyzers" Version="1.2.0-beta.507" />
+    <PackageVersion Include="StyleCop.Analyzers" Version="1.2.0-beta.556" />
     <PackageVersion Include="System.Diagnostics.DiagnosticSource" Version="7.0.2" />
     <PackageVersion Include="System.Threading.Tasks.Extensions" Version="4.5.4" />
-    <PackageVersion Include="xunit" Version="2.6.3" />
-    <PackageVersion Include="xunit.runner.visualstudio" Version="2.5.5" />
+    <PackageVersion Include="xunit" Version="2.6.4" />
+    <PackageVersion Include="xunit.runner.visualstudio" Version="2.5.6" />
     <PackageVersion Include="YamlDotNet" Version="13.7.1" />
   </ItemGroup>