fix: brightcove/brightcove-popup/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

brightcove/brightcove-popup/package.json

@@ -15,7 +15,7 @@
     "@types/react-dom": "^17.0.0",
     "@types/react-router-dom": "^5.1.8",
     "axios": "^0.21.1",
-    "gulp": "^4.0.2",
+    "gulp": "^5.0.0",
     "moment": "^2.29.1",
     "react": "^17.0.2",
     "react-dom": "^17.0.2",