*Change heartbeat check to 1/4 the heartBeatInterval rate

src/index.ts

@@ -75,7 +75,10 @@ export default class DHTCache extends EventEmitter {
       });
 
     this._ensurePeer(this.id);
-    setInterval(() => this._heartbeatCheck(), 5 * 1000);
+    setInterval(
+      () => this._heartbeatCheck(),
+      (this.heartBeatInterval / 4) * 1000
+    );
     setInterval(() => this._emitHeartbeat(), this.heartBeatInterval * 1000);
   }