v0.5.0

Please see the 0.5.0 release notes for more!

• [breaking] Color scales with diverging color schemes now default to diverging instead of linear. #845
• [breaking] Change the return signature of the internal mark.initializer method. #801
• Add mark initializers via the initializer option. #801
• Add hexbin transform. #801
• Add dodge transform. #801
• Add circle mark. #801
• Add hexagon mark. #801
• Add hexgrid mark. #801
• The sort transform now accepts channels as input. #801
• The dot mark now sorts by descending radius by default. #801
• The dot and text marks now support the interval option. #627
• Improve performance of internal array operations and type coercion. Thanks, @yurivish! #801
• Fix crash with area mark shorthand. #851
• The ruleX mark now supports the dx and dy options. #856
• Fix top-level zero scale option. #890
• Fix font variant for axis labels and ramp legends. #911 #912
• Fix the sort option with the box mark. #910