Inclut load-grunt-tasks dans les dépendences principales.

package.json

@@ -26,13 +26,13 @@
     "grunt-exec": "^3.0.0",
     "grunt-http-server": "^2.1.0",
     "grunt-watcher": "^1.0.0",
+    "load-grunt-tasks": "^5.1.0",
     "readdirp": "^3.2.0",
     "reveal.js": "file://./external/reveal.js"
   },
   "devDependencies": {
     "husky": "^1.3.1",
     "lint-staged": "^8.2.1",
-    "load-grunt-tasks": "^5.1.0",
     "prettier": "^1.19.0"
   },
   "husky": {