Bump camel-xstream from 3.18.2 to 3.19.0

Bumps camel-xstream from 3.18.2 to 3.19.0.

---
updated-dependencies:
- dependency-name: org.apache.camel:camel-xstream
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

approvaltests/pom.xml

@@ -22,7 +22,7 @@
         <dependency>
             <groupId>org.apache.camel</groupId>
             <artifactId>camel-xstream</artifactId>
-            <version>3.18.2</version>
+            <version>3.19.0</version>
         </dependency>
         <dependency>
             <groupId>org.testng</groupId>