Fix argument passing in the Task class

This code snippet sets up logging so that a worker process can call `console.log` and its siblings and have them show up in the renderer process’s console… but it’s trying to destructure the antiquated magical `arguments` collection (which is like an array, but isn’t an array!) and the engine doesn’t seem to like it.

Logging didn’t work for me until I changed this.

This is such a tiny fix, and I don’t have the energy to shelve everything on this branch just to make a separate PR.

src/task.js

@@ -73,9 +73,9 @@ module.exports = class Task {
  const env = Object.assign({}, process.env, {userAgent: navigator.userAgent});
  this.childProcess = ChildProcess.fork(require.resolve('./task-bootstrap'), [compileCachePath, taskPath], { env, silent: true});
 
- this.on("task:log", () => console.log(...arguments));
- this.on("task:warn", () => console.warn(...arguments));
- this.on("task:error", () => console.error(...arguments));
+ this.on("task:log",  (...args) => console.log(...args) );
+ this.on("task:warn",  (...args) => console.warn(...args) );
+ this.on("task:error", (...args) => console.error(...args));
 
  this.on("task:deprecations", (deprecations) => {
  for (let i = 0; i < deprecations.length; i++) {
@@ -157,7 +157,7 @@ module.exports = class Task {
  }
 
  once(eventName, callback) {
- var disposable = this.on(eventName, function(...args) {
+ var disposable = this.on(eventName, function (...args) {
  disposable.dispose();
  callback(...args);
  });