Steps to replicate the issue (include links if applicable):

• pywikibot.WbTime(year=2020, second=5)

What happens?: WbTime(year=2020, month=1, day=1, hour=0, minute=0, second=5, precision=9, before=0, after=0, timezone=0, calendarmodel=http://www.wikidata.org/entity/Q1985727)

What should have happened instead?: WbTime(year=2020, month=1, day=1, hour=0, minute=0, second=5, precision=14, before=0, after=0, timezone=0, calendarmodel=http://www.wikidata.org/entity/Q1985727)

Software version (skip for WMF-hosted wikis like Wikipedia):

Other information (browser name/version, screenshots, etc.):