Bump org.apache.maven.plugins:maven-surefire-plugin from 3.5.5 to 3.5.6 (closes #266)

Bumps [org.apache.maven.plugins:maven-surefire-plugin](https://github.com/apache/maven-surefire) from 3.5.5 to 3.5.6.
- [Release notes](https://github.com/apache/maven-surefire/releases)
- [Commits](https://github.com/apache/maven-surefire/compare/surefire-3.5.5...surefire-3.5.6)

---
updated-dependencies:
- dependency-name: org.apache.maven.plugins:maven-surefire-plugin
  dependency-version: 3.5.6
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Change-Id: I2034508aedf8c9a994fbff0b732b352d68b3de81
Reviewed-on: https://korap.ids-mannheim.de/gerrit/c/KorAP/Koral/+/10955
Reviewed-by: Nils Diewald <nils@diewald-online.de>
diff --git a/pom.xml b/pom.xml
index 90f40d5..2c6bf4d 100644
--- a/pom.xml
+++ b/pom.xml
@@ -192,7 +192,7 @@
 			<plugin>
 				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-surefire-plugin</artifactId>
-				<version>3.5.5</version>
+				<version>3.5.6</version>
 				<configuration>
                     <useSystemClassLoader>false</useSystemClassLoader>
 					<excludes>