Bump tar and firebase-tools

Bumps [tar](https://github.com/isaacs/node-tar) to 7.5.16 and updates ancestor dependency [firebase-tools](https://github.com/firebase/firebase-tools). These dependencies need to be updated together.


Updates `tar` from 6.2.1 to 7.5.16
- [Release notes](https://github.com/isaacs/node-tar/releases)
- [Changelog](https://github.com/isaacs/node-tar/blob/main/CHANGELOG.md)
- [Commits](isaacs/node-tar@v6.2.1...v7.5.16)

Updates `firebase-tools` from 14.24.0 to 15.20.0
- [Release notes](https://github.com/firebase/firebase-tools/releases)
- [Changelog](https://github.com/firebase/firebase-tools/blob/main/CHANGELOG.md)
- [Commits](firebase/firebase-tools@v14.24.0...v15.20.0)

---
updated-dependencies:
- dependency-name: tar
  dependency-version: 7.5.16
  dependency-type: indirect
- dependency-name: firebase-tools
  dependency-version: 15.20.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

firestore/main/package.json

@@ -17,7 +17,7 @@
   },
   "devDependencies": {
     "@types/mocha": "^10.0.1",
-    "firebase-tools": "^12.2.1",
+    "firebase-tools": "^15.20.0",
     "mocha": "^10.2.0",
     "debug": "^4.4.3"
   }

firestore/solution-deletes/functions/package.json

@@ -14,6 +14,6 @@
   "dependencies": {
     "firebase-admin": "^11.9.0",
     "firebase-functions": "^4.4.0",
-    "firebase-tools": "^12.2.1"
+    "firebase-tools": "^15.20.0"
   }
 }