Bump xstream from 1.3 to 1.4.15 in /syncman-filedatabase#4

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dependabot/maven/syncman-filedatabase/com.thoughtworks.xstream-xstream-1.4.15devent/syncman:dependabot/maven/syncman-filedatabase/com.thoughtworks.xstream-xstream-1.4.15Copy head branch name to clipboard