perseus-button-group => button-group
perseus-button-group => button-group

Toto, I've a feeling we're not in Perseus anymore.
quicktoolbox/react-components,Khan/react-components,redsunsoft/react-components,jepezi/react-components,redsunsoft/react-components,vasanthk/react-components,Khan/react-components,quicktoolbox/react-components,vasanthk/react-components,sloria/react-components,sloria/react-components,sloria/react-components,redsunsoft/react-components,Khan/react-components,jepezi/react-components,vasanthk/react-components,jepezi/react-components,quicktoolbox/react-components