build(deps-dev): bump fetch-mock from 6.5.2 to 7.4.0

Bumps [fetch-mock](https://github.com/wheresrhys/fetch-mock) from 6.5.2 to 7.4.0.
- [Release notes](https://github.com/wheresrhys/fetch-mock/releases)
- [Commits](wheresrhys/fetch-mock@v6.5.2...v7.4.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

packages/superset-ui-connection/package.json

@@ -27,7 +27,7 @@
   "homepage": "https://github.com/apache-superset/superset-ui#readme",
   "devDependencies": {
     "@types/fetch-mock": "^6.0.0",
-    "fetch-mock": "^6.5.2",
+    "fetch-mock": "^7.4.0",
     "node-fetch": "^2.2.0"
   },
   "dependencies": {