Handle microsecond timestamps

[GeorgeHahn]

I've observed that artist mix playlists are being sent with timestamps measured in microseconds. This causes Date::from_timestamp_ms to return an error.

Handled with a simple heuristic that will stop working in about two hundred years.

[roderickvd]

Pfff... I am no longer surprised by tricks like these pulled by Spotify. Thanks and to those who read this after 2200: we were here 😜