Merge pull request nestjs#3381 from nestjs/renovate/mongodb-3.x

fix(deps): update dependency mongodb to v3.3.4

Author: kamilmysliwiec

sample/13-mongo-typeorm/package-lock.json

@@ -23,7 +23,7 @@
     "@nestjs/core": "6.9.0",
     "@nestjs/platform-express": "6.9.0",
     "@nestjs/typeorm": "6.2.0",
-    "mongodb": "3.3.3",
+    "mongodb": "3.3.4",
     "reflect-metadata": "0.1.13",
     "rimraf": "2.7.1",
     "rxjs": "6.5.3",