Bump sockjs from 0.3.19 to 0.3.21 in /rsocket-react-demo#12

dependabot[bot] wants to merge 1 commit intomasterlinux-china/spring-boot-rsocket-demo:masterfrom

dependabot/npm_and_yarn/rsocket-react-demo/sockjs-0.3.21linux-china/spring-boot-rsocket-demo:dependabot/npm_and_yarn/rsocket-react-demo/sockjs-0.3.21Copy head branch name to clipboard