Bump log4js from 1.1.0 to 6.4.0

Bumps [log4js](https://github.com/log4js-node/log4js-node) from 1.1.0 to 6.4.0.
- [Release notes](https://github.com/log4js-node/log4js-node/releases)
- [Changelog](https://github.com/log4js-node/log4js-node/blob/master/CHANGELOG.md)
- [Commits](log4js-node/log4js-node@v1.1.0...v6.4.0)

---
updated-dependencies:
- dependency-name: log4js
  dependency-type: direct:production
...

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Author: dependabot[bot]

package-lock.json

@@ -3,7 +3,7 @@
   "description": "Mongodb Adapter for the eip module. It supports an aggregator store saved in mongodb.",
   "version": "0.1.0",
   "dependencies": {
-    "log4js": "^1.1.0"
+    "log4js": "^6.4.0"
   },
   "peerDependencies": {
     "eip": "^1.0.2",