Bump level from 6.0.1 to 7.0.0

Bumps [level](https://github.com/Level/level) from 6.0.1 to 7.0.0.
- [Release notes](https://github.com/Level/level/releases)
- [Changelog](https://github.com/Level/level/blob/master/CHANGELOG.md)
- [Commits](Level/level@v6.0.1...v7.0.0)

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

package.json

@@ -17,7 +17,7 @@
     "prepublishOnly": "npm run dependency-check"
   },
   "dependencies": {
-    "level": "^6.0.0",
+    "level": "^7.0.0",
     "multileveldown": "^4.0.0",
     "readable-stream": "^3.6.0"
   },