v1.2.0 Updated dependencies

e24b2b8 bump version to 1.2.0
c6ee8be Bump css-loader from 5.1.0 to 5.2.7 (#298)
d89ec6d bump @rjsf/core to v3.1 (#312)
bb50e85 Bump @rjsf/material-ui from 2.5.1 to 3.0.0 (#310)
bf552e8 Bump optimize-css-assets-webpack-plugin from 5.0.4 to 6.0.1 (#306)
71b53fc Bump prettier from 2.2.1 to 2.3.2 (#302)
758122a Bump @material-ui/core from 4.11.4 to 4.12.3 (#304)
f605027 Bump http-server from 0.12.3 to 13.0.0 (#305)
612a741 Bump @babel/core from 7.14.0 to 7.15.0 (#307)
0189f57 Bump @babel/plugin-transform-object-assign from 7.12.1 to 7.14.5 (#308)
e053f83 Bump @testing-library/react from 11.2.6 to 12.0.0 (#303)
0b7f745 Bump eslint-plugin-react from 7.22.0 to 7.24.0 (#309)