fix: properly display date and time placeholders for DateTimeRangeFilter

[jsheffie]

closes: #113

Changes:

• Brought in contrib/admin/widgets.py:AdminSplitDateTime and made two changes:
  • modified init to accept date_attrs and time_attrs and pass them down to the subwidgets.
  • don't pass args to this init call forms.MultiWidget.__init__(self, widgets)

Status:
Alright, this is working for Django 4.2 and above.
I am currently trying to figure out how to make this work on older versions of django.

Visualize

📸 Before: displays 'date' in the time fields

📸 After: displays 'time' in the time fields

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 57.14286% with 6 lines in your changes missing coverage. Please review.

Project coverage is 86.70%. Comparing base (b4f6c29) to head (01ffef8).
Report is 17 commits behind head on master.

Files with missing lines	Patch %	Lines
rangefilter/filters.py	57.14%	6 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #112      +/-   ##
==========================================
- Coverage   87.45%   86.70%   -0.75%     
==========================================
  Files           9        9              
  Lines         606      617      +11     
==========================================
+ Hits          530      535       +5     
- Misses         76       82       +6     

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[silentsokolov]

Look nice! Thanks you!
I think it will take more time for testing to ensure there are no critical errors on older versions. After fix current tests