build(deps): bump log4j.version from 2.15.0 to 2.16.0 (#648)

Bumps `log4j.version` from 2.15.0 to 2.16.0.

Updates `log4j-core` from 2.15.0 to 2.16.0

Updates `log4j-slf4j-impl` from 2.15.0 to 2.16.0

Updates `log4j-api` from 2.15.0 to 2.16.0

---
updated-dependencies:
- dependency-name: org.apache.logging.log4j:log4j-core
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: org.apache.logging.log4j:log4j-slf4j-impl
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: org.apache.logging.log4j:log4j-api
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Author: dependabot[bot]

pom.xml

@@ -53,7 +53,7 @@
     <properties>
         <maven.compiler.source>1.8</maven.compiler.source>
         <maven.compiler.target>1.8</maven.compiler.target>
-        <log4j.version>2.15.0</log4j.version>
+        <log4j.version>2.16.0</log4j.version>
         <jackson.version>2.13.0</jackson.version>
         <aspectj.version>1.9.7</aspectj.version>
         <aws.sdk.version>2.17.99</aws.sdk.version>