*Add removeRelay and clearRelays API methods

src/index.ts

@@ -42,6 +42,17 @@ export class DHT {
             throw new Error(err);
         }
     }
+
+    public async removeRelay(pubkey: string): Promise<void> {
+        const [, err] = await callModule(DHT_MODULE, "removeRelay", {pubkey});
+        if (err) {
+            throw new Error(err);
+        }
+    }
+
+    public async clearRelays(): Promise<void> {
+        await callModule(DHT_MODULE, "clearRelays");
+    }
 }
 
 export class Socket extends EventEmitter {