Update Microsoft.Omex.Extensions.Hosting.UnitTests.csproj

tests/Hosting.UnitTests/Microsoft.Omex.Extensions.Hosting.UnitTests.csproj

@@ -4,6 +4,7 @@
   </PropertyGroup>
   <ItemGroup>
     <PackageReference Include="Microsoft.Extensions.Hosting" />
+    <PackageReference Include="Newtonsoft.Json" /> <!-- Bump version of transitive dependency -->
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\..\src\Hosting\Microsoft.Omex.Extensions.Hosting.csproj" />