Bump postcss and react-scripts in /client#50

dependabot[bot] wants to merge 1 commit intomasterdanmun/mernblog:masterfrom

dependabot/npm_and_yarn/client/postcss-and-react-scripts-8.4.17danmun/mernblog:dependabot/npm_and_yarn/client/postcss-and-react-scripts-8.4.17Copy head branch name to clipboard