Added method to revokes link of group chat (#421)

README.md

@@ -527,6 +527,11 @@ Of course, replace ``` xyz ``` with an actual ID.
     console.log("joined to: " + response.gid)
     ```
     Of course, replace ``` xxx ``` with invitation code.
+- To revokes the current invite link of a group
+    ``` ts
+    const response = await conn.revokeInvite ("abcd-xyz@g.us")
+    console.log("new group code: " + response.code)
+    ```
 
 ## Broadcast Lists & Stories
 

src/WAConnection/8.Groups.ts

@@ -182,4 +182,9 @@ export class WAConnection extends Base {
         const response = await this.query({ json: ['action', 'invite', jid], expect200: true })
         return response
     }
+    /** Revokes the current invite link for a group chat */
+    async revokeInvite(jid) {
+        const response = await this.query({ json: ['action', 'inviteReset', jid], expect200: true })
+        return response
+    }
 }