fix(deps): bump qs to 6.15.0 [DX-748] (#570)

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## Summary

Bump qs dep to most recent version; pin in package.json and ensure new
patch version will be released. Replaces #567

## Description

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## Motivation and Context

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## PR Checklist

- [x] I have read the `CONTRIBUTING.md` file
- [x] All commits follow [conventional
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Author: whitelisab

package-lock.json

@@ -39,7 +39,7 @@
     "fast-copy": "^3.0.2",
     "lodash": "^4.17.23",
     "process": "^0.11.10",
-    "qs": "^6.14.1"
+    "qs": "^6.15.0"
   },
   "devDependencies": {
     "@rollup/plugin-json": "^6.1.0",