DeprecationWarning: datetime.datetime.utcnow() is deprecated

  /home/jrollins/ligo/src/greg/sgn-ts/src/sgnts/utils.py:15: DeprecationWarning: datetime.datetime.utcnow() is deprecated and scheduled for removal in a future version. Use timezone-aware objects to represent datetimes in UTC: datetime.datetime.now(datetime.UTC).
    return float(to_gps(datetime.utcnow()))