Allow floating point times for smbclient.utime

[mon]

The doc for utime:

If times is not None, it must be a 2-tuple of the form (atime, mtime) where each member is an int or float expressing seconds.

However, providing floats throws:

TypeError: Cannot parse value for field last_access_time of type float to an int

This fixes that and adds a unit test to verify.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.03%. Comparing base (9f3e83e) to head (dc84653).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #317      +/-   ##
==========================================
- Coverage   99.05%   99.03%   -0.02%     
==========================================
  Files          24       24              
  Lines        5184     5184              
==========================================
- Hits         5135     5134       -1     
- Misses         49       50       +1     

Flag	Coverage Δ
arm64	68.22% <100.00%> (ø)
macOS	68.22% <100.00%> (ø)
py3.10	98.99% <100.00%> (ø)
py3.11	98.99% <100.00%> (-0.02%)	⬇️
py3.12	98.99% <100.00%> (ø)
py3.13	98.99% <100.00%> (ø)
py3.8	98.99% <100.00%> (ø)
py3.9	99.03% <100.00%> (ø)
ubuntu	96.83% <100.00%> (ø)
windows	98.95% <100.00%> (-0.02%)	⬇️
x64	99.03% <100.00%> (ø)
x86	98.95% <100.00%> (-0.02%)	⬇️

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[jborean93]

Looks great, thanks for adding the test as well!