feat(HscanStream): adding NOVALUES option

README.md

@@ -722,12 +722,18 @@ the key names are not utf8 strings.
 There are also `hscanStream`, `zscanStream` and `sscanStream` to iterate through elements in a hash, zset and set. The interface of each is
 similar to `scanStream` except the first argument is the key name:
 
+```javascript
+const stream = redis.zscanStream("myhash", {
+  match: "age:??",
+});
+```
+Also `hscanStream` accept noValues option (true or false)
 ```javascript
 const stream = redis.hscanStream("myhash", {
   match: "age:??",
+  noValues: true,
 });
 ```
-
 You can learn more from the [Redis documentation](http://redis.io/commands/scan).
 
 **Useful Tips**

lib/ScanStream.ts

@@ -7,6 +7,7 @@ interface Options extends ReadableOptions {
   command: string;
   redis: any;
   count?: string | number;
+  noValues?: boolean;
 }
 
 /**
@@ -39,7 +40,9 @@ export default class ScanStream extends Readable {
     if (this.opt.count) {
       args.push("COUNT", String(this.opt.count));
     }
-
+    if (this.opt.noValues) {
+      args.push("NOVALUES");
+    }
     this.opt.redis[this.opt.command](args, (err, res) => {
       if (err) {
         this.emit("error", err);

lib/types.ts

@@ -30,4 +30,5 @@ export interface ScanStreamOptions {
   match?: string;
   type?: string;
   count?: number;
-}
+  noValues?: boolean;
+}