Bump multileveldown from 3.x to 4.x (#33)

dependabot[bot] · web-flow · commit bcd7c700894d · 2021-05-01T10:09:09.000+02:00
diff --git a/package.json b/package.json
@@ -18,7 +18,7 @@
   },
   "dependencies": {
     "level": "^6.0.0",
-    "multileveldown": "^3.0.0",
+    "multileveldown": "^4.0.0",
     "readable-stream": "^3.6.0"
   },
   "devDependencies": {
