Bump maven-compiler-plugin from 3.8.1 to 3.9.0

Bumps [maven-compiler-plugin](https://github.com/apache/maven-compiler-plugin) from 3.8.1 to 3.9.0.
- [Release notes](https://github.com/apache/maven-compiler-plugin/releases)
- [Commits](apache/maven-compiler-plugin@maven-compiler-plugin-3.8.1...maven-compiler-plugin-3.9.0)

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

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

pom.xml

@@ -214,7 +214,7 @@
     <!-- Need to stay on 3.0.0 until https://issues.apache.org/jira/browse/MSHARED-854 is fixed -->
     <maven-checkstyle-plugin.version>3.1.2</maven-checkstyle-plugin.version>
     <maven-clean-plugin.version>3.1.0</maven-clean-plugin.version>
-    <maven-compiler-plugin.version>3.8.1</maven-compiler-plugin.version>
+    <maven-compiler-plugin.version>3.9.0</maven-compiler-plugin.version>
     <maven-dependency-plugin.version>3.2.0</maven-dependency-plugin.version>
     <maven-deploy-plugin.version>2.8.2</maven-deploy-plugin.version>
     <maven-ear-plugin.version>3.2.0</maven-ear-plugin.version>