Bump xstream from 1.4.11.1 to 1.4.13-java7 in /zmq-playground#29

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dependabot/maven/zmq-playground/com.thoughtworks.xstream-xstream-1.4.13-java7testusr/Experiments:dependabot/maven/zmq-playground/com.thoughtworks.xstream-xstream-1.4.13-java7Copy head branch name to clipboard