Bump jaxb-api from 2.1 to 2.3.1

Bumps [jaxb-api](https://github.com/javaee/jaxb-spec) from 2.1 to 2.3.1.
- [Release notes](https://github.com/javaee/jaxb-spec/releases)
- [Commits](https://github.com/javaee/jaxb-spec/commits/2.3.1)

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

Author: dependabot[bot]

modello-plugins/modello-plugin-java/pom.xml

@@ -32,7 +32,7 @@
     <dependency>
       <groupId>javax.xml.bind</groupId>
       <artifactId>jaxb-api</artifactId>
-      <version>2.1</version>
+      <version>2.3.1</version>
       <scope>test</scope>
     </dependency>
 

modello-test/pom.xml

@@ -40,7 +40,7 @@
     <dependency>
       <groupId>javax.xml.bind</groupId>
       <artifactId>jaxb-api</artifactId>
-      <version>2.1</version>
+      <version>2.3.1</version>
       <scope>test</scope>
     </dependency>
   </dependencies>