Bump rocket from 0.4.2 to 0.4.7 in /server/rocket#37

dependabot[bot] wants to merge 1 commit intomastersteadylearner/React_with_servers:masterfrom

dependabot/cargo/server/rocket/rocket-0.4.7steadylearner/React_with_servers:dependabot/cargo/server/rocket/rocket-0.4.7Copy head branch name to clipboard