v1.5.1

Fixed

• Scattergeo and choropleth now correctly fire hover and click events [#215]
• Heatmap and contour traces are redrawn in the correct order [#194]
• Early returns in Plotly.plot now correctly return Promise rejections [#226]
• Soon to be deprecated SVGElement.offsetParent calls are removed [#222]
• Geo zoom in button is now correctly titled Zoom in [#219]
• All attribute description are correctly stripped from the dist files (bug
  introduced in 1.5.0) [#223]
• Insecure dev dependencies ecstatic and uglify-js are bumped [#225]
• Outdated karma-browserify dev dependency is bumped [#229]