Bump maven-enforcer-plugin from 3.1.0 to 3.2.1 (#38)

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] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

pom.xml

@@ -77,7 +77,7 @@
     <minimal-version.java>11</minimal-version.java>
     <minimal-version.maven>3.8.4</minimal-version.maven>
     <!-- plugins -->
-    <enforcer-plugin.version>3.1.0</enforcer-plugin.version>
+    <enforcer-plugin.version>3.2.1</enforcer-plugin.version>
     <clean-plugin.version>3.2.0</clean-plugin.version>
     <flatten-plugin.version>1.3.0</flatten-plugin.version>
     <compiler-plugin.version>3.10.1</compiler-plugin.version>