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

[codecov[bot]]

Codecov Report

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

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

```diff @@ 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](https://codecov.io/gh/SciQLop/speasy/pull/81?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=SciQLop) | Coverage Δ | | |---|---|---| | [speasy/core/data\_containers.py](https://codecov.io/gh/SciQLop/speasy/pull/81/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=SciQLop#diff-c3BlYXN5L2NvcmUvZGF0YV9jb250YWluZXJzLnB5) | `87.35% <33.33%> (ø)` | | | [speasy/core/cdf/\_\_init\_\_.py](https://codecov.io/gh/SciQLop/speasy/pull/81/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=SciQLop#diff-c3BlYXN5L2NvcmUvY2RmL19faW5pdF9fLnB5) | `78.12% <0.00%> (ø)` | | Help us with your feedback. Take ten seconds to tell us [how you rate us](https://about.codecov.io/nps?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=SciQLop). Have a feature suggestion? [Share it here.](https://app.codecov.io/gh/feedback/?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=SciQLop)

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