Bump maven-enforcer-plugin from 3.1.0 to 3.2.1

Bumps [maven-enforcer-plugin](https://github.com/apache/maven-enforcer) from 3.1.0 to 3.2.1.
- [Release notes](https://github.com/apache/maven-enforcer/releases)
- [Commits](apache/maven-enforcer@enforcer-3.1.0...enforcer-3.2.1)

---
updated-dependencies:
- dependency-name: org.apache.maven.plugins:maven-enforcer-plugin
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

pom.xml

@@ -99,7 +99,7 @@
     <maven-dependency-plugin.version>3.5.0</maven-dependency-plugin.version>
     <maven-deploy-plugin.version>3.1.0</maven-deploy-plugin.version>
     <maven-eclipse-plugin.version>2.10</maven-eclipse-plugin.version>
-    <maven-enforcer-plugin.version>3.1.0</maven-enforcer-plugin.version>
+    <maven-enforcer-plugin.version>3.2.1</maven-enforcer-plugin.version>
     <maven-gpg-plugin.version>3.0.1</maven-gpg-plugin.version>
     <maven-help-plugin.version>3.3.0</maven-help-plugin.version>
     <maven-install-plugin.version>3.1.0</maven-install-plugin.version>