change default conf generation arguments

[hadim]

Checklist:

• [x] Add tests to cover the fixed bug(s) or the new introduced feature(s) (if appropriate).
• [ ] Update the API documentation is a new function is added or an existing one is deleted.
• [x] Added a news entry.
  • copy news/TEMPLATE.rst to news/my-feature-or-branch.rst) and edit it.

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[codecov[bot]]

Codecov Report

Merging #90 (ed3a1fc) into main (dc70124) will increase coverage by 0.27%. The diff coverage is 98.21%.

@@            Coverage Diff             @@
##             main      #90      +/-   ##
==========================================
+ Coverage   82.22%   82.49%   +0.27%     
==========================================
  Files          45       46       +1     
  Lines        3150     3176      +26     
==========================================
+ Hits         2590     2620      +30     
+ Misses        560      556       -4     

Flag	Coverage Δ
unittests	82.49% <98.21%> (+0.27%)	:arrow_up:

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

Impacted Files	Coverage Δ
datamol/conformers/_conformers.py	92.71% <96.55%> (+3.20%)	:arrow_up:
datamol/__init__.py	100.00% <100.00%> (ø)
datamol/conformers/__init__.py	100.00% <100.00%> (ø)
datamol/conformers/_features.py	91.22% <100.00%> (+3.42%)	:arrow_up:
datamol/types.py	100.00% <100.00%> (ø)

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