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>

Author: dependabot[bot]

pom.xml

@@ -48,7 +48,7 @@
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <apache.http.version>4.5.3</apache.http.version>
         <version.plugin.surefire>3.0.0-M8</version.plugin.surefire>
-        <maven-enforcer-plugin-version>3.1.0</maven-enforcer-plugin-version>
+        <maven-enforcer-plugin-version>3.2.1</maven-enforcer-plugin-version>
         <maven-clean-plugin-version>3.2.0</maven-clean-plugin-version>
         <maven-compiler-plugin-version>3.10.1</maven-compiler-plugin-version>
         <maven-install-plugin-version>3.1.0</maven-install-plugin-version>