Accessing PropTypes via the main React package is deprecated.

[gnunua]

lowPriorityWarning.js:40 Warning: Accessing PropTypes via the main React package is deprecated, and will be removed in React v16.0. Use the latest available v15.* prop-types package from npm instead. For info on usage, compatibility, migration and more, see https://fb.me/prop-types-docs

in LineChart.js still using React.propTypes instead of exporting PropTypes from prop-types

[jeroenptrs]

proptypes has been taken out of react's core completely. It needs to be imported via 'prop-types' package. React Docs

[jeroenptrs]

I opened a PR, but it seems the problem is all over the react-D3 ecosystem.