feature: allow sweeping of inactive request buckets

src/rest/RESTManager.js

@@ -13,6 +13,15 @@ class RESTManager {
     this.tokenPrefix = tokenPrefix;
     this.versioned = true;
     this.timeDifferences = [];
+    if (client.options.restSweepInterval > 0) {
+      client.setInterval(() => {
+        for (const handler in this.handlers) {
+          if (this.handlers[handler] && this.handlers[handler]._inactive) {
+            this.handlers[handler] = undefined;
+          }
+        }
+      }, client.options.restSweepInterval * 1000);
+    }
   }
 
   get api() {

src/rest/handlers/RequestHandler.js

@@ -26,6 +26,13 @@ class RequestHandler {
     this.handle();
   }
 
+  get _inactive() {
+    return this.queue.length === 0 &&
+      !this.limited &&
+      Date.now() > this.resetTime &&
+      (typeof this.busy === 'undefined' || this.busy === false);
+  }
+
   execute(item) {
     return new Promise((resolve, reject) => {
       const finish = timeout => {