Use rest parameters

lib/composite-disposable.js

@@ -30,10 +30,10 @@ module.exports = class CompositeDisposable {
   */
 
   // Public: Construct an instance, optionally with one or more disposables
-  constructor() {
+  constructor(...args) {
     this.disposed = false
     this.disposables = new Set()
-    for (let disposable of arguments) {
+    for (let disposable of args) {
       this.add(disposable)
     }
   }