FIX support ``float32`` in ``celer_path``

[Badr-MOUFAD]

fixes #259

This will proceed as follows:

• [x] fix bug
• [x] add unit testing

[codecov-commenter]

Codecov Report

Merging #260 (06e0e86) into main (4230db1) will increase coverage by 0.02%. The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #260      +/-   ##
==========================================
+ Coverage   88.42%   88.44%   +0.02%     
==========================================
  Files          15       15              
  Lines        1132     1134       +2     
  Branches      136      136              
==========================================
+ Hits         1001     1003       +2     
  Misses        101      101              
  Partials       30       30              

Flag	Coverage Δ
unittests	∅ <ø> (∅)

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Impacted Files	Coverage Δ
celer/tests/test_lasso.py	100.00% <100.00%> (ø)

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[mathurinm]

Thanks @Badr-MOUFAD