Bump org.apache.maven.plugins:maven-failsafe-plugin from 3.5.5 to 3.5.6

Bumps [org.apache.maven.plugins:maven-failsafe-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-failsafe-plugin
  dependency-version: 3.5.6
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

pom.xml

@@ -82,7 +82,7 @@
     <maven-clean-plugin.version>3.5.0</maven-clean-plugin.version>
     <maven-install-plugin.version>3.1.4</maven-install-plugin.version>
     <maven-surefire-plugin.version>3.5.5</maven-surefire-plugin.version>
-    <maven-failsafe-plugin.version>3.5.5</maven-failsafe-plugin.version>
+    <maven-failsafe-plugin.version>3.5.6</maven-failsafe-plugin.version>
     <maven-resources-plugin.version>3.5.0</maven-resources-plugin.version>
     <maven-enforcer-plugin.version>3.6.3</maven-enforcer-plugin.version>
     <maven-jar-plugin.version>3.5.0</maven-jar-plugin.version>