Bump org.javassist:javassist from 3.30.2-GA to 3.31.0-GA (#317)

Bumps [org.javassist:javassist](https://github.com/jboss-javassist/javassist) from 3.30.2-GA to 3.31.0-GA.
- [Release notes](https://github.com/jboss-javassist/javassist/releases)
- [Changelog](https://github.com/jboss-javassist/javassist/blob/master/Changes.md)
- [Commits](https://github.com/jboss-javassist/javassist/commits)

---
updated-dependencies:
- dependency-name: org.javassist:javassist
  dependency-version: 3.31.0-GA
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Author: dependabot[bot]

cxf-xjc-plugin/pom.xml

@@ -119,7 +119,7 @@
         <dependency>
             <groupId>org.javassist</groupId>
             <artifactId>javassist</artifactId>
-            <version>3.30.2-GA</version>
+            <version>3.31.0-GA</version>
         </dependency>
     </dependencies>