v5.19.0

Changes from v5.18.0:

vega-functions

• Add pluck expression function. (thanks @arvind!)
• Add additional Vega-Lite selection helper methods. (thanks @arvind!)

vega-parser

• Fix signal check for data source values property. (thanks @domoritz!)

vega-scenegraph

• Fix namespace use for SVG metadata. (thanks @mbostock!)
• Update to JSON schema draft 7. (thanks @domoritz!)

vega-schema

• Update to JSON schema draft 7. (thanks @domoritz!)

vega-selections

• Add additional Vega-Lite selection helper methods. (thanks @arvind!)