Bump plexus.compiler.version from 2.15.0 to 2.16.0

Bumps `plexus.compiler.version` from 2.15.0 to 2.16.0.

Updates `org.codehaus.plexus:plexus-compiler-javac` from 2.15.0 to 2.16.0

Updates `org.codehaus.plexus:plexus-compiler-api` from 2.15.0 to 2.16.0
- [Release notes](https://github.com/codehaus-plexus/plexus-compiler/releases)
- [Commits](codehaus-plexus/plexus-compiler@plexus-compiler-2.15.0...plexus-compiler-2.16.0)

---
updated-dependencies:
- dependency-name: org.codehaus.plexus:plexus-compiler-javac
  dependency-version: 2.16.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: org.codehaus.plexus:plexus-compiler-api
  dependency-version: 2.16.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

modello-test/pom.xml

@@ -13,7 +13,7 @@
     and xml files to test every feature for every plugin.</description>
 
   <properties>
-    <plexus.compiler.version>2.15.0</plexus.compiler.version>
+    <plexus.compiler.version>2.16.0</plexus.compiler.version>
   </properties>
   <dependencies>
     <dependency>