fix: package.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-ANSIREGEX-1583908
- https://snyk.io/vuln/SNYK-JS-DECODEURICOMPONENT-3149970
- https://snyk.io/vuln/SNYK-JS-GLOBPARENT-1016905
- https://snyk.io/vuln/SNYK-JS-INFLIGHT-6095116
- https://snyk.io/vuln/SNYK-JS-UNSETVALUE-2400660

package.json

@@ -22,7 +22,7 @@
         "sass": "^1.56.1"
     },
     "dependencies": {
-        "gulp": "^4.0.2",
+        "gulp": "^5.0.0",
         "vinyl-buffer": "^1.0.1",
         "vinyl-source-stream": "^2.0.0"
     }