Add an error handling on http.request

This will prevent the http request here throwing out errors.

lib/api/client.js

@@ -125,6 +125,11 @@ Client.prototype.makeRequest = function(obj) {
 			callback(null, resData); //no error, so no err object
 		});
 	});
+	
+	
+	req.on('error', (e) => {
+		callback(e, null);
+	});
 
 	req.end();
 };