chore(deps): update devdependency @nuxt/test-utils to ^3.15.0 (#137)

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

Author: renovate[bot]

package-lock.json

@@ -47,7 +47,7 @@
     "@nuxt/kit": "^3.14.1592",
     "@nuxt/module-builder": "^0.8.4",
     "@nuxt/schema": "^3.14.1592",
-    "@nuxt/test-utils": "^3.14.4",
+    "@nuxt/test-utils": "^3.15.0",
     "@nuxt/ui": "^2.19.2",
     "@types/leaflet.heat": "^0.2.4",
     "@types/node": "^22.10.1",