Bump log4js from 6.3.0 to 6.4.0

Bumps [log4js](https://github.com/log4js-node/log4js-node) from 6.3.0 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](https://github.com/log4js-node/log4js-node/compare/v6.3.0...v6.4.0)

---
updated-dependencies:
- dependency-name: log4js
  dependency-type: indirect
...

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

package-lock.json

@@ -1,6 +1,6 @@
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@@ -5945,12 +5945,6 @@
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@@ -7529,25 +7523,6 @@
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@@ -10336,25 +10311,64 @@
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-      "version": "6.3.0",
+      "version": "6.4.0",
-      "resolved": "https://registry.npmjs.org/log4js/-/log4js-6.3.0.tgz",
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       "dev": true,
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-        "streamroller": "^2.2.4"
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+          "resolved": "https://registry.npmjs.org/debug/-/debug-4.3.3.tgz",
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           "dev": true,
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+            "universalify": "^2.0.0"
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@@ -10362,6 +10376,29 @@
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+          "resolved": "https://registry.npmjs.org/rfdc/-/rfdc-1.3.0.tgz",
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+            "debug": "^4.1.1",
+            "fs-extra": "^10.0.0"
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+          "resolved": "https://registry.npmjs.org/universalify/-/universalify-2.0.0.tgz",
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+          "dev": true
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@@ -13809,12 +13846,6 @@
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@@ -15107,40 +15138,6 @@
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