Bump log4j.version from 2.21.1 to 2.22.0 (closes #162)

Bumps `log4j.version` from 2.21.1 to 2.22.0.

Updates `org.apache.logging.log4j:log4j-api` from 2.21.1 to 2.22.0

Updates `org.apache.logging.log4j:log4j-core` from 2.21.1 to 2.22.0

Updates `org.apache.logging.log4j:log4j-slf4j-impl` from 2.21.1 to 2.22.0

Updates `org.apache.logging.log4j:log4j-jul` from 2.21.1 to 2.22.0

---
updated-dependencies:
- 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
- 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-jul
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Change-Id: I9ef8bbf4eb7e7a36917f29dccb08139738c41042
Reviewed-on: https://korap.ids-mannheim.de/gerrit/c/KorAP/Koral/+/7928
Reviewed-by: Nils Diewald <nils@diewald-online.de>
diff --git a/pom.xml b/pom.xml
index 06f92ec..ffd95d3 100644
--- a/pom.xml
+++ b/pom.xml
@@ -43,7 +43,7 @@
 		<antlr4.version>4.9.3</antlr4.version>
 		<antlr3.version>3.5.3</antlr3.version>
 		<java.version>11</java.version>
-		<log4j.version>2.21.1</log4j.version>
+		<log4j.version>2.22.0</log4j.version>
 	</properties>
 	
 	<repositories>