Bump the dotnet group with 2 updates (#64)

Bumps Microsoft.NET.Test.Sdk from 18.0.1 to 18.3.0
Bumps Snapshooter.Xunit from 1.1.0 to 1.3.1

---
updated-dependencies:
- dependency-name: Microsoft.NET.Test.Sdk
  dependency-version: 18.3.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: dotnet
- dependency-name: Snapshooter.Xunit
  dependency-version: 1.3.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: dotnet
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

Directory.Packages.props

@@ -11,12 +11,12 @@
   </PropertyGroup>
   <ItemGroup>
     <PackageVersion Include="coverlet.collector" Version="8.0.0" />
-    <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="18.0.1" />
+    <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="18.3.0" />
     <PackageVersion Include="MinVer" Version="7.0.0">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
       <PrivateAssets>all</PrivateAssets>
     </PackageVersion>
-    <PackageVersion Include="Snapshooter.Xunit" Version="1.1.0" />
+    <PackageVersion Include="Snapshooter.Xunit" Version="1.3.1" />
     <PackageVersion Include="xunit" Version="2.9.3" />
     <PackageVersion Include="xunit.runner.visualstudio" Version="3.1.5" />
     <PackageVersion Include="Microsoft.SourceLink.GitHub" Version="10.0.103" PrivateAssets="All" />