chore(deps): bump leveldown from 5.6.0 to 6.0.0

Bumps [leveldown](https://github.com/Level/leveldown) from 5.6.0 to 6.0.0.
- [Release notes](https://github.com/Level/leveldown/releases)
- [Changelog](https://github.com/Level/leveldown/blob/master/CHANGELOG.md)
- [Commits](Level/leveldown@v5.6.0...v6.0.0)

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

package.json

@@ -35,7 +35,7 @@
   },
   "dependencies": {
     "konsum-db": "^3.4.0",
-    "leveldown": "^5.6.0",
+    "leveldown": "^6.0.0",
     "levelup": "^4.4.0",
     "sqlite": "^4.0.19",
     "sqlite3": "^5.0.1"