Update to latest versions of React, Material-UI

Updates a number of core dependencies, namely:

• [email protected]
• @material-ui/[email protected]
• [email protected]

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.