Update to xUnit 2.3.0

Author: sharwell

StyleCop.Analyzers/StyleCop.Analyzers.Test.CSharp7/StyleCop.Analyzers.Test.CSharp7.csproj

@@ -16,8 +16,8 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.CodeAnalysis" Version="2.1.0" />
-    <PackageReference Include="xunit" Version="2.3.0-beta3-build3705" />
-    <PackageReference Include="xunit.runner.visualstudio" Version="2.3.0-beta5-build3769" PrivateAssets="all" />
+    <PackageReference Include="xunit" Version="2.3.0" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.3.0" PrivateAssets="all" />
   </ItemGroup>
 
   <ItemGroup>

StyleCop.Analyzers/StyleCop.Analyzers.Test/StyleCop.Analyzers.Test.csproj

@@ -16,8 +16,8 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.CodeAnalysis" Version="1.2.1" />
-    <PackageReference Include="xunit" Version="2.3.0-beta3-build3705" />
-    <PackageReference Include="xunit.runner.visualstudio" Version="2.3.0-beta5-build3769" PrivateAssets="all" />
+    <PackageReference Include="xunit" Version="2.3.0" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.3.0" PrivateAssets="all" />
   </ItemGroup>
 
   <ItemGroup>