Update docs with Node builtins

Author: davidmyersdev

README.md

@@ -39,6 +39,7 @@ Pass an object to `externalizeDeps` to override the default configuration.
 // These are the default values.
 externalizeDeps({
   deps: true,
+  nodeBuiltins: true,
   optionalDeps: true,
   peerDeps: true,
   useFile: join(process.cwd(), 'package.json'),