Fix getdeps issue

[PythonFZ]

• fix getdeps issue
• bump required znjson version

[codecov]

Codecov Report

Merging #262 (204b1ad) into main (c5e3a96) will decrease coverage by 0.19%.
The diff coverage is 60.00%.

@@            Coverage Diff             @@
##             main     #262      +/-   ##
==========================================
- Coverage   71.81%   71.62%   -0.20%     
==========================================
  Files          26       26              
  Lines        1100     1103       +3     
  Branches      211      212       +1     
==========================================
  Hits          790      790              
- Misses        286      289       +3     
  Partials       24       24              

Flag	Coverage Δ
unittests	71.62% <60.00%> (-0.20%)	⬇️

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Impacted Files	Coverage Δ
zntrack/core/dvcgraph.py	70.66% <60.00%> (-1.45%)	⬇️

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