Improve args check to support optional params for makeRequest

lib/makeRequest.js

@@ -33,7 +33,7 @@ function getRequestOpts(self, requestArgs, spec, overrideData) {
   const options = utils.getOptionsFromArgs(args);
 
   // Validate that there are no more args.
-  if (args.length) {
+  if (args.filter((x) => x !== undefined && x !== null).length) {
     throw new Error(
       `Stripe: Unknown arguments (${args}). Did you mean to pass an options object? See https://github.com/stripe/stripe-node/wiki/Passing-Options. (on API request to ${requestMethod} \`${path}\`)`
     );