Bump org.apache.maven.plugins:maven-surefire-plugin from 3.5.5 to 3.5.6 (#877)

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:production
  update-type: version-update:semver-patch
...

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Author: dependabot[bot]

pom.xml

@@ -80,7 +80,7 @@
         <maven.jar.plugin.version>3.5.0</maven.jar.plugin.version>
         <maven.javadoc.plugin.version>3.12.0</maven.javadoc.plugin.version>
         <maven.source.plugin.version>3.4.0</maven.source.plugin.version>
-        <maven.surefire.plugin.version>3.5.5</maven.surefire.plugin.version>
+        <maven.surefire.plugin.version>3.5.6</maven.surefire.plugin.version>
     </properties>
 
     <dependencyManagement>