Bump underscore from 1.13.4 to 1.13.6

Bumps [underscore](https://github.com/jashkenas/underscore) from 1.13.4 to 1.13.6.
- [Release notes](https://github.com/jashkenas/underscore/releases)
- [Commits](https://github.com/jashkenas/underscore/compare/1.13.4...1.13.6)

---
updated-dependencies:
- dependency-name: underscore
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

package.json

@@ -51,7 +51,7 @@
         "trim-newlines": ">=4.0.2",
         "ts-loader": "^9.4.1",
         "typescript": "^4.8.3",
-        "underscore": ">=1.13.4",
+        "underscore": ">=1.13.6",
         "validator": "^13.7.0",
         "webpack": "^5.74.0",
         "webpack-cli": "^4.10.0"