Bump superagent from 7.1.3 to 7.1.6

Bumps [superagent](https://github.com/visionmedia/superagent) from 7.1.3 to 7.1.6.
- [Release notes](https://github.com/visionmedia/superagent/releases)
- [Changelog](https://github.com/visionmedia/superagent/blob/master/HISTORY.md)
- [Commits](ladjs/superagent@v7.1.3...v7.1.6)

---
updated-dependencies:
- dependency-name: superagent
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

package.json

@@ -15,7 +15,7 @@
   },
   "dependencies": {
     "async": "3.2.4",
-    "superagent": "7.1.3"
+    "superagent": "7.1.6"
   },
   "devDependencies": {
     "browserify": "17.0.0",