fix(material-ui/core): bump to v4.11.1, rename ExpansionPanel -> Accordion#419

meowsbits wants to merge 1 commit intomasteropen-rpc/docs-react:masterfrom

fix/material-ui-v4.11.1-accordionopen-rpc/docs-react:fix/material-ui-v4.11.1-accordionCopy head branch name to clipboard