Bump async from 2.6.3 to 3.2.0

Bumps [async](https://github.com/caolan/async) from 2.6.3 to 3.2.0.
- [Release notes](https://github.com/caolan/async/releases)
- [Changelog](https://github.com/caolan/async/blob/master/CHANGELOG.md)
- [Commits](caolan/async@v2.6.3...v3.2.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Author: dependabot-preview[bot]

package-lock.json

@@ -20,7 +20,7 @@
   },
   "homepage": "https://github.com/themost-framework/themost#readme",
   "dependencies": {
-    "async": "^2.6.3",
+    "async": "^3.2.0",
     "blueimp-md5": "^2.7.0",
     "es6-promise": "^4.2.8",
     "events": "^3.2.0",