Bump json5, react-dev-utils and react-scripts in /webapp#49

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dependabot/npm_and_yarn/webapp/json5-and-react-dev-utils-and-react-scripts-2.2.2RowanACM/ReactRebuild:dependabot/npm_and_yarn/webapp/json5-and-react-dev-utils-and-react-scripts-2.2.2Copy head branch name to clipboard