Supporting datetime bounds for DatetimePicker and DatetimeRangePicker

[hoxbro]

I noticed the options minDateHasTime and maxDateHasTime

screenrecord-2022-08-29_12.23.48.mp4

import datetime

import panel as pn

datetime_picker = pn.widgets.DatetimePicker(
    name="Datetime Picker",
    value=datetime.datetime(2021, 3, 2, 12, 10),
    end=datetime.datetime(2021, 3, 4, 12, 10),
    start=datetime.datetime(2021, 3, 1, 12, 10),
)

pn.Row(
    datetime_picker,
    f"start: {datetime_picker.start}",
    f"end: {datetime_picker.end}",
).servable()

[codecov]

Codecov Report

Merging #3788 (c6e19fc) into master (5cbc4fd) will increase coverage by 0.04%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #3788      +/-   ##
==========================================
+ Coverage   82.83%   82.87%   +0.04%     
==========================================
  Files         220      220              
  Lines       31933    31925       -8     
==========================================
+ Hits        26452    26459       +7     
+ Misses       5481     5466      -15     

Flag	Coverage Δ
ui-tests	33.71% <7.69%> (-0.01%)	⬇️
unitexamples-tests	75.84% <100.00%> (+0.04%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
panel/tests/widgets/test_input.py	100.00% <100.00%> (ø)
panel/widgets/input.py	96.17% <100.00%> (+0.11%)	⬆️
panel/reactive.py	78.31% <0.00%> (+0.66%)	⬆️
panel/util.py	87.16% <0.00%> (+0.75%)	⬆️
panel/widgets/debugger.py	92.96% <0.00%> (+4.68%)	⬆️

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[philippjfr]

Thanks @hoxbro!