Bump plexus-compiler-javac from 2.1 to 2.8.8

Bumps plexus-compiler-javac from 2.1 to 2.8.8.

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

Author: dependabot[bot]

modello-test/pom.xml

@@ -26,7 +26,7 @@
     <dependency>
       <groupId>org.codehaus.plexus</groupId>
       <artifactId>plexus-compiler-javac</artifactId>
-      <version>2.1</version>
+      <version>2.8.8</version>
     </dependency>
     <dependency>
       <groupId>org.codehaus.plexus</groupId>