Bump xstream from 1.3.1 to 1.4.13-java7 in /rm-skeleton#54

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dependabot/maven/rm-skeleton/com.thoughtworks.xstream-xstream-1.4.13-java7openEHR/java-libs:dependabot/maven/rm-skeleton/com.thoughtworks.xstream-xstream-1.4.13-java7Copy head branch name to clipboard