Update dependency load-grunt-tasks to v5

Author: renovate-bot

themes/minos/package.json

@@ -4,7 +4,7 @@
   "private": true,
   "devDependencies": {
     "grunt": "0.4.5",
-    "load-grunt-tasks": "0.2.1",
+    "load-grunt-tasks": "5.1.0",
     "grunt-git": "0.2.14",
     "grunt-contrib-clean": "0.7.0",
     "grunt-contrib-copy": "0.4.1"