Bump org.apache.logging.log4j:log4j-core from 2.1 to 2.12.4 in /core

Bumps org.apache.logging.log4j:log4j-core from 2.1 to 2.12.4.

---
updated-dependencies:
- dependency-name: org.apache.logging.log4j:log4j-core
  dependency-type: direct:development
...

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1 file changed