Bump org.apache.maven.plugins:maven-surefire-plugin from 3.5.5 to 3.5.6 (#1424)

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](apache/maven-surefire@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
...

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Author: dependabot[bot]

pom.xml

@@ -67,7 +67,7 @@
     <version.javadoc.plugin>3.12.0</version.javadoc.plugin>
     <version.release.plugin>3.3.1</version.release.plugin>
     <version.source.plugin>3.4.0</version.source.plugin>
-    <version.surefire.plugin>3.5.5</version.surefire.plugin>
+    <version.surefire.plugin>3.5.6</version.surefire.plugin>
     <version.nexus.plugin>1.7.0</version.nexus.plugin>