Replaces np.float by np.float64 since it was removed in numpy 1.24

[jeandet]

No description provided.

[codecov]

Codecov Report

Base: 83.24% // Head: 83.17% // Decreases project coverage by -0.06% ⚠️

Coverage data is based on head (f27788b) compared to base (f11b4c9).
Patch coverage: 33.33% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #81      +/-   ##
==========================================
- Coverage   83.24%   83.17%   -0.07%     
==========================================
  Files          44       45       +1     
  Lines        2679     2711      +32     
  Branches      404      415      +11     
==========================================
+ Hits         2230     2255      +25     
- Misses        321      324       +3     
- Partials      128      132       +4     

Impacted Files	Coverage Δ
speasy/core/data_containers.py	87.35% <33.33%> (ø)
speasy/core/cdf/__init__.py	78.12% <0.00%> (ø)

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