Bump maven.api.version from 3.8.6 to 3.9.0

Bumps `maven.api.version` from 3.8.6 to 3.9.0.

Updates `maven-plugin-api` from 3.8.6 to 3.9.0
- [Release notes](https://github.com/apache/maven/releases)
- [Commits](apache/maven@maven-3.8.6...maven-3.9.0)

Updates `maven-core` from 3.8.6 to 3.9.0
- [Release notes](https://github.com/apache/maven/releases)
- [Commits](apache/maven@maven-3.8.6...maven-3.9.0)

Updates `maven-artifact` from 3.8.6 to 3.9.0
- [Release notes](https://github.com/apache/maven/releases)
- [Commits](apache/maven@maven-3.8.6...maven-3.9.0)

Updates `maven-compat` from 3.8.6 to 3.9.0
- [Release notes](https://github.com/apache/maven/releases)
- [Commits](apache/maven@maven-3.8.6...maven-3.9.0)

---
updated-dependencies:
- dependency-name: org.apache.maven:maven-plugin-api
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: org.apache.maven:maven-core
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: org.apache.maven:maven-artifact
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: org.apache.maven:maven-compat
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

maven-plugin/pom.xml

@@ -12,7 +12,7 @@
   <packaging>maven-plugin</packaging>
 
   <properties>
-    <maven.api.version>3.8.7</maven.api.version>
+    <maven.api.version>3.9.0</maven.api.version>
   </properties>
 
   <prerequisites>