User Story

As a Wikipedia editor, I want to be able to select which series from a dataset to display in a chart so that I don't need to create new datasets for each chart representing a subset of the data.

Acceptance Criteria

• It's possible to define a .chart file that accept a new parameter series with an array of series names (e.g. { "series": [ "vaccinations", "infections" ] }.
• Charts with series defined render only the specified series from the dataset on preview.
• Charts with series defined can be embedded in an article to render only the specified series from the dataset.