Bump log4j2.version from 2.17.2 to 2.18.0

Bumps `log4j2.version` from 2.17.2 to 2.18.0.

Updates `log4j-slf4j-impl` from 2.17.2 to 2.18.0

Updates `log4j-jcl` from 2.17.2 to 2.18.0

Updates `log4j-api` from 2.17.2 to 2.18.0

Updates `log4j-core` from 2.17.2 to 2.18.0

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

Signed-off-by: dependabot[bot] <support@github.com>
diff --git a/pom.xml b/pom.xml
index 0bf08d2..135fd37 100644
--- a/pom.xml
+++ b/pom.xml
@@ -483,7 +483,7 @@
         <jaxbri.version>2.3.6</jaxbri.version>
         <jetty.version>10.0.11</jetty.version>
         <jibx.version>1.3.3</jibx.version>
-        <log4j2.version>2.17.2</log4j2.version>
+        <log4j2.version>2.18.0</log4j2.version>
         <maven.archiver.version>3.6.0</maven.archiver.version>
         <maven.version>3.8.6</maven.version>
         <plexus.utils.version>3.4.2</plexus.utils.version>