6.3

• Support filtering with Q objects (Shohan Dutta Roy)
• Support random ordering with .order_by("?") (Shohan Dutta Roy)
• Support distinct() on querysets (Shohan Dutta Roy)
• Support iso_weekday and iso_year field lookups (Andy Babic)
• Support datetime transform expressions on values and values_list (Andy Babic)
• Fix: Correctly handle filtering on fields on related models when those fields have names that match a lookup type (Andy Babic)
• Fix: Correctly handle null foreign keys when traversing related fields (Andy Babic)