Bump lodash from 4.17.15 to 4.17.19 in /scripts/mongodb-migration

Bumps [lodash](https://github.com/lodash/lodash) from 4.17.15 to 4.17.19.
- [Release notes](https://github.com/lodash/lodash/releases)
- [Commits](lodash/lodash@4.17.15...4.17.19)

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

scripts/mongodb-migration/package-lock.json

@@ -10,7 +10,7 @@
   "dependencies": {
     "config": "^2.0.2",
     "dynamoose": "^1.1.0",
-    "lodash": "^4.17.12",
+    "lodash": "^4.17.19",
     "moment": "^2.22.2",
     "mongoose": "^5.9.6",
     "path": "^0.12.7",