*Join added to the wrong class

src/index.ts

@@ -49,6 +49,10 @@ export class SwarmClient extends Client {
   public async getRelays(): Promise<string[]> {
     return this.callModuleReturn("getRelays", { swarm: this.swarm });
   }
+
+  join(topic: Buffer): void {
+    this.callModule("join", { id: this.id, topic });
+  }
 }
 
 export class Socket extends Client {
@@ -100,10 +104,6 @@ export class Socket extends Client {
     );
   }
 
-  join(topic: Buffer): void {
-    this.callModule("join", { id: this.id, topic });
-  }
-
   private ensureEvent(event: string): void {
     if (!(event in this.eventUpdates)) {
       this.eventUpdates[event] = [];