Use fixed react-dev-utils integrity hash (#3916)
Use fixed react-dev-utils integrity hash (#3916)


mozilla/idea-town,mozilla/idea-town-server,mozilla/idea-town,flodolo/testpilot,mozilla/idea-town-server,flodolo/testpilot,flodolo/testpilot,mozilla/idea-town-server,mozilla/idea-town-server,mozilla/idea-town,mozilla/idea-town,flodolo/testpilot