Update dependency gulp to v5

Author: renovate[bot]

javascript-practice/simple-side-bar/package.json

@@ -35,7 +35,7 @@
     "devDependencies": {
         "browser-sync": "2.26.14",
         "del": "6.0.0",
-        "gulp": "4.0.2",
+        "gulp": "5.0.1",
         "merge-stream": "2.0.0"
     }
 }