Bump xstream from 1.3.1 to 1.4.15 in /client#63

dependabot[bot] wants to merge 1 commit intomastercaelum/restfulie-java:masterfrom

dependabot/maven/client/com.thoughtworks.xstream-xstream-1.4.15caelum/restfulie-java:dependabot/maven/client/com.thoughtworks.xstream-xstream-1.4.15Copy head branch name to clipboard