Bump Microsoft.CodeAnalysis.CSharp from 2.10.0 to 4.1.0 (#743)

Author: dependabot[bot]

src/NerdBank.GitVersioning.Tests/NerdBank.GitVersioning.Tests.csproj

@@ -33,15 +33,14 @@
   </ItemGroup>
   <ItemGroup>
     <PackageReference Include="Newtonsoft.Json.Schema" Version="3.0.10" />
-    <PackageReference Include="System.Collections.Immutable" Version="1.5.0" />
     <PackageReference Include="Microsoft.Build" Version="15.1.548" ExcludeAssets="runtime" />
     <PackageReference Include="Microsoft.Build.Utilities.Core" Version="15.1.548" ExcludeAssets="runtime" />
     <PackageReference Include="Microsoft.Build.Locator" Version="1.4.1" />
     <PackageReference Include="System.Threading.Tasks.Dataflow" Version="4.9.0" />
     <PackageReference Include="Xunit.Combinatorial" Version="1.2.7" />
     <PackageReference Include="xunit" Version="2.4.1" />
     <PackageReference Include="coverlet.collector" Version="1.3.0" />
-    <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="2.10.0" />
+    <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="4.1.0" />
     <PackageReference Include="Nerdbank.GitVersioning.LKG" Version="3.4.173-alpha" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.4.1">
       <PrivateAssets>all</PrivateAssets>