Sparkline Support

[MarkhamShofner]

Here is a custom definition that could be used, should cedar ever move to support sparklines. ... indicating values that were specific to my definition generation and don't need to be mirrored. Primarily lean on the 'type': 'line', and the 'overrides': portions.

    let definition = {
      'type': 'line',
      'datasets': ...,
      'series': [{
        'source': ...,
        'category': {
          'field': ...',
          'label': ...
        },
        'group': ..,
        'value': {
          'field': ...,
          'label': ...
        }
      }],
      'overrides': {
        'type': 'serial',
        'theme': 'calcite',
        'autoMargins': false,
        'marginLeft': 0,
        'marginRight': 3,
        'marginTop': 0,
        'marginBottom': 0,
        'graphs': [{
          'bullet': 'none',
          // 'lineColor': '#4c4c4c', // '#a9ec49'
        }],
        'valueAxes': [{
          'gridAlpha': 0,
          'axisAlpha': 0,
          'minimum': -1,
        }],
        'categoryAxis': {
          'gridAlpha': 0,
          'axisAlpha': 0,
          'startOnAxis': true,
        }
      },
      'legend': {},
      'style': {}
    };
    return definition;
  })
});

Which leads to a sparkline that looks like this