hvega-0.10.0.0: tests/specs/time/timeUnitTransform.vl

{
    "transform": [
        {
            "as": "month",
            "field": "date",
            "timeUnit": "month"
        }
    ],
    "mark": "line",
    "data": {
        "url": "https://vega.github.io/vega-lite/data/seattle-weather.csv"
    },
    "$schema": "https://vega.github.io/schema/vega-lite/v4.json",
    "encoding": {
        "x": {
            "field": "month",
            "type": "temporal",
            "axis": {
                "format": "%b"
            }
        },
        "y": {
            "field": "temp_max",
            "aggregate": "max",
            "type": "quantitative"
        }
    }
}