DateRange filter: Yesterday option fails on January 1st

[marcgibbons]

Happy new year!

Running my test suite this morning revealed that the "yesterday" option of the DateRangeFilter fails on January 1.

This happens because today's year is extracted rather than yesterday's year to generate the queryset filter parameter. Given that today is Jan 1, 2018, the date of Dec 31, 2018 is used rather than Dec 31, 2017.

django-filter/django_filters/filters.py

Lines 446 to 449 in 553c9ea

	5: (_('Yesterday'), lambda qs, name: qs.filter(**{
	'%s__year' % name: now().year,
	'%s__month' % name: now().month,
	'%s__day' % name: (now() - timedelta(days=1)).day,

Generated SQL:
WHERE (my_date_field BETWEEN 2018-01-01 AND 2018-12-31 AND EXTRACT(MONTH FROM my_date_field) = 1 AND EXTRACT(DAY FROM my_date_field) = 31)'

This appears to fix:

     '%s__year' % name: (now() - timedelta(days=1)).year, 
     '%s__month' % name: (now() - timedelta(days=1)).month,
     '%s__day' % name: (now() - timedelta(days=1)).day, 

PR to follow.