Merge pull request #188 from bitpay/dependabot/nuget/BitPayUnitTest/Microsoft.NET.Test.Sdk-18.5.1

Bump Microsoft.NET.Test.Sdk from 17.8.0 to 18.5.1

Author: aharoitx

BitPayUnitTest/BitPayUnitTest.csproj

@@ -8,7 +8,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.8.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.5.1" />
     <PackageReference Include="Moq" Version="4.18.4" />
     <PackageReference Include="xunit" Version="2.5.0" />
     <PackageReference Include="xunit.runner.visualstudio" Version="3.0.2">