Bump log4j-core from 2.7 to 2.16.0

Bumps log4j-core from 2.7 to 2.16.0.

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

pom.xml

@@ -38,7 +38,7 @@
 		<junit.version>4.12</junit.version>
 
 		<!-- Log4j version -->
-		<log4j.version>2.7</log4j.version>
+		<log4j.version>2.16.0</log4j.version>
 
 		<!-- Maven Plugins -->
 		<maven.compiler.source>1.8</maven.compiler.source>