build(deps): update underscore requirement

Updates the requirements on [underscore](https://github.com/jashkenas/underscore) to permit the latest version.
- [Commits](jashkenas/underscore@1.12.1...1.13.6)

---
updated-dependencies:
- dependency-name: underscore
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

superset-frontend/plugins/legacy-preset-chart-deckgl/package.json

@@ -37,7 +37,7 @@
     "mousetrap": "^1.6.1",
     "prop-types": "^15.6.0",
     "react-bootstrap-slider": "2.1.5",
-    "underscore": "^1.12.1",
+    "underscore": "^1.13.6",
     "urijs": "^1.19.8",
     "xss": "^1.0.10"
   },