[Snyk] Security upgrade log4js from 2.3.3 to 6.0.0

[tomasklima]

This PR was automatically created by Snyk using the credentials of a real user.

Snyk has created this PR to fix one or more vulnerable packages in the `npm` dependencies of this project.

Changes included in this PR

• Changes to the following files to upgrade the vulnerable dependencies to a fixed version:
  • package.json
  • package-lock.json

Vulnerabilities that will be fixed

With an upgrade:

Severity	Priority Score (*)	Issue	Breaking Change	Exploit Maturity
	823/1000 Why? Proof of Concept exploit, Recently disclosed, Has a fix available, CVSS 8.6	Server-side Request Forgery (SSRF) SNYK-JS-IP-6240864	Yes	Proof of Concept

(*) Note that the real score may have changed since the PR was raised.

Commit messages

Package name: log4js

The new version differs by 250 commits.

• 660d336 6.0.0
• d0f190d chore: added streamroller PR to changelog
• 8cc50d9 Merge pull request #962 from log4js-node/update-streamroller
• 0f6b58d fix: update streamroller to fix unhandled promise rejection
• 02bed72 chore(docs): added date-format update to changelog
• bf4ea61 Merge pull request #960 from log4js-node/update-date-format
• 28d6b07 chore(deps): updated date-format to 3.0.0
• ca6ad39 5.3.0
• 6d1bb6c docs: updated changelog
• 12f2c18 Merge pull request #956 from log4js-node/truncate-filename
• 2f45b08 fix: truncation and padding for stacktraces
• 5d5d667 5.2.2
• 1e69573 docs: updated changelog
• e484be1 Merge pull request #951 from log4js-node/fix-date-rolling-overwrite
• 60ca3ef fix: update streamroller to fix #906
• 1bd7a64 Updated expired slack invite link
• 70e4b8c 5.2.1
• 0c46c37 docs: updated changelog for 5.2.1
• 4f0544a Merge pull request #949 from log4js-node/fix-numToKeep-for-digit-patterns
• 0ffe536 fix: update streamroller to handle date patterns that are all digits
• 48ab8f3 5.2.0
• 7e24ecd docs: Updated changelog for 5.2.0
• bb5f332 Merge pull request #948 from log4js-node/windows-stability
• 348cfe6 fix: updated streamroller to improve windows log rolling

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