Merge pull request #20 from AndDone-LLC/dependabot/nuget/src/AndDoneSecureClientLibrary.Test/Microsoft.NET.Test.Sdk-18.4.0

Bump Microsoft.NET.Test.Sdk from 15.9.2 to 18.4.0

Author: Dylan-FMK

src/AndDoneSecureClientLibrary.Test/AndDoneSecureClientLibrary.Test.csproj

@@ -8,7 +8,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="15.9.2" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.4.0" />
     <PackageReference Include="xunit" Version="2.4.2" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.4.5" />
   </ItemGroup>