Bump xstream from 1.3.1 to 1.4.6 in /tcslackbuildnotifier-core#176

dependabot[bot] wants to merge 1 commit intomasterPeteGoo/tcSlackBuildNotifier:masterfrom

dependabot/maven/tcslackbuildnotifier-core/com.thoughtworks.xstream-xstream-1.4.6PeteGoo/tcSlackBuildNotifier:dependabot/maven/tcslackbuildnotifier-core/com.thoughtworks.xstream-xstream-1.4.6Copy head branch name to clipboard