build(deps): bump har-validator from 4.2.1 to 5.1.5

Bumps [har-validator](https://github.com/ahmadnassri/node-har-validator) from 4.2.1 to 5.1.5.
- [Release notes](https://github.com/ahmadnassri/node-har-validator/releases)
- [Changelog](https://github.com/ahmadnassri/node-har-validator/blob/master/.releaserc)
- [Commits](ahmadnassri/node-har-validator@v4.2.1...v5.1.5)

---
updated-dependencies:
- dependency-name: har-validator
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

package.json

@@ -44,6 +44,6 @@
   "dependencies": {
     "commander": "^2.8.1",
     "debug": "^4.0.0",
-    "har-validator": "^4.0.1"
+    "har-validator": "^5.1.5"
   }
 }