Merge pull request #377 from plotly/release-4.1.0

chore: Update files for v4.1.0

Merge pull request #371 from plotly/release-4.0.0

chore: Version updates for v4.0.0

Merge pull request #365 from plotly/release-3.0.0

chore: Version updates for v3.0.0

Merge pull request #218 from plotly/version-bump-251

Version bump 2.5.1

Merge pull request #202 from plotly/updates-2020

Updates 2020

Merge pull request #160 from plotly/2.4.0

2.4.0 release

Bugfixes; removed deprecated react methods; refactor; devDep updates

new events for plotly.js 1.37.0

bugfix release