Switched playground to webpack 5 and other small fixes#2958

Merged

heath-freenome merged 3 commits intorjsf-team:rjsf-v5from heath-freenome:upgrade-webpack

Jul 28, 2022

+8,827-21,444

Commits on Jul 22, 2022

Switched playground to webpack 5 and other small fixes
heath-freenome
committed

Commits on Jul 28, 2022

- Bumped antd libraries to latest
heath-freenome
committed
- Updated theme libraries to match the ones in the updated theme package.json files
heath-freenome
committed