Bump underscore from 1.12.0 to 1.13.6

Bumps [underscore](https://github.com/jashkenas/underscore) from 1.12.0 to 1.13.6.
- [Release notes](https://github.com/jashkenas/underscore/releases)
- [Commits](jashkenas/underscore@1.12.0...1.13.6)

---
updated-dependencies:
- dependency-name: underscore
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

package.json

@@ -94,7 +94,7 @@
     "snap.js": "^2.0.9",
     "stream-browserify": "^3.0.0",
     "strengthify": "github:nextcloud/strengthify#0.5.9",
-    "underscore": "1.13.4",
+    "underscore": "1.13.6",
     "url-search-params-polyfill": "^8.1.1",
     "v-click-outside": "^3.2.0",
     "v-tooltip": "^2.1.3",