Bump core lib to 4.3.0

Author: ATimmeh33

src/Signhost.APIClient/Signhost.APIClient.csproj

@@ -44,6 +44,6 @@
 			<IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
 		</PackageReference>
 		<PackageReference Include="Polly" Version="8.6.5" />
-		<PackageReference Include="EntrustSignhostClientLibrary" Version="4.2.1" />
+		<PackageReference Include="EntrustSignhostClientLibrary" Version="4.3.0" />
 	</ItemGroup>
 </Project>