missing package configurations

[ed555009]

bitgo-api-client/src/BitGo.Api.Client/BitGo.Api.Client.csproj

Lines 2 to 6 in c041bd3

	<PropertyGroup>
	<TargetFramework>net8.0</TargetFramework>
	<ImplicitUsings>enable</ImplicitUsings>
	<Nullable>enable</Nullable>
	</PropertyGroup>