Merge pull request plotly#558 from plotly/v4.1.0

release prep

Merge pull request plotly#539 from plotly/v4

v4 changelog

bump react-chart-editor and plotly.js (plotly#527)

* bump react-chart-editor and plotly.js

* version bump

Version 3.0.3

Version 3.0.2

Version 3.0.1

Version 3.0.0

* Fixed query panel for non-sql connectors (plotly#451)

* Fixed build failure with dtrace-provider (plotly#421)
* Fixed broken oauth redirection in web app (plotly#260)

* Disabled nodeIntegration (plotly#453)
* Ensured new windows are created using `shell.openExternal` (plotly#453)

* Connector for Oracle databases (plotly#437)

* Backend: Added API for creating a grid to store results from scheduled queries (plotly#444)

* UI: Added a vertical scrollbar to the database view
* UI: Don't hide the code editor when the chart editor opens (plotly#445)
* Log: Reduced verbosity

* Backend: Fixed error message on failed connection

* Upgraded to Electron v2.0.1 (and Node v8)
* Prevent navigation on drag'n'drop (plotly#436)

Version 2.6.0