Bump axios from 0.18.0 to 0.18.1 in /user-simulator/src

Bumps [axios](https://github.com/axios/axios) from 0.18.0 to 0.18.1.
- [Release notes](https://github.com/axios/axios/releases)
- [Changelog](https://github.com/axios/axios/blob/v0.18.1/CHANGELOG.md)
- [Commits](axios/axios@v0.18.0...v0.18.1)

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

Author: dependabot[bot]

user-simulator/src/package-lock.json

@@ -10,7 +10,7 @@
   "author": "Uzziah Eyee",
   "license": "ISC",
   "dependencies": {
-    "axios": "^0.18.0",
+    "axios": "^0.18.1",
     "node-cron": "^1.2.1",
     "jaeger-client": "^3.14.4"
   }