Add backward compatibility support for deprecated `formatType`.
Add backward compatibility support for deprecated `formatType`.

vega/vega-lite,uwdata/vega-lite,vega/vega-lite,uwdata/vega-lite,uwdata/vega-lite,uwdata/vega-lite,uwdata/vega-lite,vega/vega-lite,vega/vega-lite,vega/vega-lite