Update dependency org.apache.logging.log4j:log4j-core to v2.12.4 - autoclosed

[staging-whitesource-for-github-com[bot]]

This PR contains the following updates:

Package	Type	Update	Change
org.apache.logging.log4j:log4j-core (source)	compile	minor	2.8.2 -> 2.12.4

By merging this PR, the below issues will be automatically resolved and closed:

Severity	CVSS Score	CVE	GitHub Issue
Critical	10.0	CVE-2021-44228	#6
Critical	9.0	CVE-2021-45046	#3
Medium	6.6	CVE-2021-44832	#7
Medium	5.9	CVE-2021-45105	#5
Low	3.7	CVE-2020-9488	#4

---

• [ ] If you want to rebase/retry this PR, check this box