3.0.4

Added events state, data, and view.

3.0.1

Migrated to npm, typescript, and lit-element.

2.0.3

Update properly when a new view is created (a new spec is passed in).

2.0.2

Resolve Vega to 3.0.5

2.0.1

Minor corrections to documentations for webcomponents.org.

2.0.0

Upgrade to Polymer 2, Vega 3, and Vega-lite 2.