fix: Handle 'date' time unit in timeOffset function properly#17

OlegWock merged 2 commits intomaindeepnote/vegafusion:mainfrom

oleh/blu-5089-stacked-column-chart-with-temporal-x-axis-and-daily-timedeepnote/vegafusion:oleh/blu-5089-stacked-column-chart-with-temporal-x-axis-and-daily-timeCopy head branch name to clipboard