Bump xstream from 1.4.11.1 to 1.4.19 in /p23-springboot-async#129

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dependabot/maven/p23-springboot-async/com.thoughtworks.xstream-xstream-1.4.19imyanger/springboot-project:dependabot/maven/p23-springboot-async/com.thoughtworks.xstream-xstream-1.4.19Copy head branch name to clipboard