Update dependency nouislider to v15

Author: renovate[bot]

package.json

@@ -369,7 +369,7 @@
     "flatpickr": "^4.6.13",
     "howler": "^2.2.3",
     "interactjs": "^1.10.17",
-    "nouislider": "^14.7.0",
+    "nouislider": "^15.0.0",
     "push.js": "^1.0.12",
     "tippy.js": "^6.3.7",
     "uikit": "^3.16.15"