GetDocumentAsync and GetReceiptAsync don't throw SignhostRestApiClientExceptions #44
Description
GetDocumentAsync and GetReceiptAsync don't throw a SignhostRestApiClientException upon faulty calls, instead they throw a 'normal' HttpRequestException.
The retry policy for the upcoming SignhostClientLibrary.Polly package won't work in these cases because they only retry on a SignhostRestApiClientException.
Because EnsureSignhostSuccessStatusCodeAsync() isn't called on those methods. Fixing this would however be a breaking change.