Bump levelup from 4.4.0 to 5.0.0 (#59)

Bumps [levelup](https://github.com/Level/levelup) from 4.4.0 to 5.0.0.
- [Release notes](https://github.com/Level/levelup/releases)
- [Changelog](https://github.com/Level/levelup/blob/master/CHANGELOG.md)
- [Commits](Level/levelup@v4.4.0...v5.0.0)

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package.json

@@ -29,7 +29,7 @@
     "encoding-down": "^7.0.0",
     "fastify-plugin": "^3.0.0",
     "leveldown": "^6.0.0",
-    "levelup": "^4.4.0"
+    "levelup": "^5.0.0"
   },
   "devDependencies": {
     "fastify": "^3.0.0",