Preserve inputs passed to depends_on and produces decorator.

[tobiasraabe]

Whenever a list with a single element or a dictionary with only a 0-valued key is passed to one of the decorators, the dictionary is preserved and available inside the function instead of passing just the single value.

[codecov]

Codecov Report

Merging #42 (8aec731) into main (58358ed) will increase coverage by 0.07%.
The diff coverage is 97.82%.

@@            Coverage Diff             @@
##             main      #42      +/-   ##
==========================================
+ Coverage   89.20%   89.28%   +0.07%     
==========================================
  Files          54       54              
  Lines        4362     4394      +32     
==========================================
+ Hits         3891     3923      +32     
  Misses        471      471              

Flag	Coverage Δ
end_to_end	75.10% <60.86%> (-0.17%)	⬇️
integration	41.89% <52.17%> (+0.90%)	⬆️
unit	68.82% <86.95%> (+0.84%)	⬆️

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

Impacted Files	Coverage Δ
src/_pytask/nodes.py	96.38% <95.23%> (+0.23%)	⬆️
tests/test_execute.py	100.00% <100.00%> (ø)
tests/test_nodes.py	92.42% <100.00%> (+0.68%)	⬆️

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