[Snyk] Upgrade org.slf4j:slf4j-log4j12 from 1.7.7 to 1.7.30

Created by: michalgagat

Snyk has created this PR to upgrade org.slf4j:slf4j-log4j12 from 1.7.7 to 1.7.30.

ℹ Keep your dependencies up-to-date. This makes it easier to fix existing vulnerabilities and to more quickly identify and fix newly disclosed vulnerabilities when they affect your project.

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• The recommended version is 22 versions ahead of your current version.
• The recommended version was released a year ago, on 2019-12-16.

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