add keywords

Author: WuPenghe

package.json

@@ -2,6 +2,7 @@
  "name": "async-optics",
  "version": "1.0.5",
  "description": "Node asynchronous process and package monitor",
+ "keywords": ["async","asynchronous","async hooks","perf hooks","performance","monitor"],
  "main": "index.js",
  "homepage": "https://github.com/AsyncOptics/async-optics",
  "bugs": {