Bump async from 0.9.2 to 2.6.4 (#52)

Bumps [async](https://github.com/caolan/async) from 0.9.2 to 2.6.4.
- [Release notes](https://github.com/caolan/async/releases)
- [Changelog](https://github.com/caolan/async/blob/v2.6.4/CHANGELOG.md)
- [Commits](https://github.com/caolan/async/compare/0.9.2...v2.6.4)

---
updated-dependencies:
- dependency-name: async
  dependency-type: direct:production
...

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package.json

@@ -8,7 +8,7 @@
   "author": "TheBeastLT <pauliox@beyond.lt>",
   "license": "MIT",
   "dependencies": {
-    "async": "0.9.2",
+    "async": "2.6.4",
     "axios": "^0.21.4",
     "bittorrent-tracker": "^9.18.2",
     "bottleneck": "^2.16.2",