Bump log4j2.version from 2.8.2 to 2.13.3 (#52)

Bumps `log4j2.version` from 2.8.2 to 2.13.3.

Updates `log4j-api` from 2.8.2 to 2.13.3

Updates `log4j-core` from 2.8.2 to 2.13.3

Updates `log4j-slf4j-impl` from 2.8.2 to 2.13.3

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
diff --git a/pom.xml b/pom.xml
index c410f58..d7a1c59 100644
--- a/pom.xml
+++ b/pom.xml
@@ -56,7 +56,7 @@
         <top.level.dir>${project.basedir}/..</top.level.dir>
         <compiler.source>1.8</compiler.source>
         <compiler.target>1.8</compiler.target>
-        <log4j2.version>2.8.2</log4j2.version>
+        <log4j2.version>2.13.3</log4j2.version>
         <commons.configuration.version>1.10</commons.configuration.version>
         <commons.configuration2.version>2.1.1</commons.configuration2.version>
         <commons.collections.version>3.2.2</commons.collections.version>