Update to latest versions of React, Material-UI
Updates a number of core dependencies, namely:
react@16.12.0
@material-ui/core@4.6.1
three@0.110.0
Also improved the load time of the docs/
folder by removing dependencies on React and Material UI. Since the docs project directly uses imports from the main project's node_modules, it was importing duplicate copies of React and Material-UI, forcing module compilation times to double. This should fix that issue.