Update dependency underscore to v1.13.6

Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

package.json

@@ -91,7 +91,7 @@
     "url": "https://github.com/goerli/netstats-server.git"
   },
   "resolutions": {
-    "**/underscore": "1.12.1"
+    "**/underscore": "1.13.6"
   },
   "homepage": "https://github.com/goerli/netstats-server",
   "bugs": {

yarn.lock

@@ -6671,11 +6671,6 @@ underscore.string@~3.3.5:
     sprintf-js "^1.1.1"
     util-deprecate "^1.0.2"
 
-[email protected]:
-  version "1.12.1"
-  resolved "https://registry.yarnpkg.com/underscore/-/underscore-1.12.1.tgz#7bb8cc9b3d397e201cf8553336d262544ead829e"
-  integrity sha512-hEQt0+ZLDVUMhebKxL4x1BTtDY7bavVofhZ9KZ4aI26X9SRaE+Y3m83XUL1UP2jn8ynjndwCCpEHdUG+9pP1Tw==
-
 [email protected]:
   version "1.13.6"
   resolved "https://registry.yarnpkg.com/underscore/-/underscore-1.13.6.tgz#04786a1f589dc6c09f761fc5f45b89e935136441"