Bump del from 6.1.1 to 8.0.0 in /extensions/ql-vscode

Bumps [del](https://github.com/sindresorhus/del) from 6.1.1 to 8.0.0.
- [Release notes](https://github.com/sindresorhus/del/releases)
- [Commits](sindresorhus/del@v6.1.1...v8.0.0)

---
updated-dependencies:
- dependency-name: del
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

extensions/ql-vscode/package-lock.json

@@ -2060,7 +2060,7 @@
     "cosmiconfig": "^9.0.0",
     "cross-env": "^7.0.3",
     "cross-spawn": "^7.0.6",
-    "del": "^6.0.0",
+    "del": "^8.0.0",
     "eslint": "^8.56.0",
     "eslint-config-prettier": "^9.0.0",
     "eslint-import-resolver-typescript": "^3.6.3",