Read pyproject.toml using utf-8 encoding

[sbidoul]

No description provided.

[codecov]

Codecov Report

Merging #90 (b485919) into master (365c195) will decrease coverage by 1.08%.
The diff coverage is 0.00%.

@@            Coverage Diff            @@
##           master     #90      +/-   ##
=========================================
- Coverage    9.63%   8.56%   -1.08%     
=========================================
  Files          16      16              
  Lines         934     934              
  Branches      197     171      -26     
=========================================
- Hits           90      80      -10     
- Misses        834     847      +13     
+ Partials       10       7       -3     

Impacted Files	Coverage Δ
src/pip_deepfreeze/pyproject_toml.py	0.00% <0.00%> (ø)
src/pip_deepfreeze/env_info_json.py	63.49% <0.00%> (-15.88%)	⬇️
src/pip_deepfreeze/pip.py	0.00% <0.00%> (ø)
src/pip_deepfreeze/sync.py	0.00% <0.00%> (ø)
src/pip_deepfreeze/tree.py	0.00% <0.00%> (ø)

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