date-to-iso-8601-string (npm): Presents a JavaScript `Date` as a string in [ISO 8601 format](https://www.loc.gov/standards/datetime/iso-tc154-wg5_n0038_iso_wd_8601-1_2016-02-16.pdf), with support for the Extended (`YYYY-MM-DD`) and Basic (`YYYYMMDD`) variants
Keywords: date|iso|iso8601|iso-8601