Duration from ISO String with milliseconds doesn't set milliseconds

[simonkleinfeld]

Describe the bug
Creating a duration from an ISO String doesn't set the milliseconds in the duration object.
dayjs.duration("P4DT12H30M17.899S")
returns
{ years: 0, months: 0, weeks: 0, days: 4, hours: 12, minutes: 30, seconds: 17.899 }

Expected behavior
The milliseconds will be set
{ years: 0, months: 0, weeks: 0, days: 4, hours: 12, minutes: 30, seconds: 17, milliseconds: 899 }

Information

• Day.js Version v1.10.7