Bump xstream from 1.4.16 to 1.4.19

Bumps [xstream](https://github.com/x-stream/xstream) from 1.4.16 to 1.4.19.
- [Release notes](https://github.com/x-stream/xstream/releases)
- [Commits](https://github.com/x-stream/xstream/commits)

---
updated-dependencies:
- dependency-name: com.thoughtworks.xstream:xstream
  dependency-type: direct:production
...

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

Author: dependabot[bot]

pom.xml

@@ -455,7 +455,7 @@
 		<dependency>
 			<groupId>com.thoughtworks.xstream</groupId>
 			<artifactId>xstream</artifactId>
-			<version>1.4.17</version>
+			<version>1.4.19</version>
 			<scope>compile</scope>
 			<exclusions>
 				<!-- we will pull in the full xpp3 so we don't need these -->