v1.14.2

Fixed

• Plotly.newPlot correctly clears all present WebGL contexts [#724]
• Bar traces with layout.bargap 0 and unset marker.line.width are functional
  again (bug introduced in 1.3.0) [#709]
• Stacked bar traces now correctly set the first bar position when leading gaps
  are present (bug introduced in 1.11.0) [#716]
• Bar traces with layout.barmode relative now correctly compute the bar sum of
  the first position when positive and negative values are present [#723]
• Event plotly_relayout is emitted upon pan / zoom on a mapbox subplot [#727]
• Lasso and select box drag modes now work with fixed ranged axes [#728]
• gl2d trace objects are purged when their parent scenes are destroyed [#724]