Bump com.thoughtworks.xstream:xstream from 1.4.15 to 1.4.21 in /corporate-parent#34

dependabot[bot] wants to merge 1 commit intomainOpenGamma/OG-Tools:mainfrom

dependabot/maven/corporate-parent/com.thoughtworks.xstream-xstream-1.4.21OpenGamma/OG-Tools:dependabot/maven/corporate-parent/com.thoughtworks.xstream-xstream-1.4.21Copy head branch name to clipboard