renamed files and target class

[codecov[bot]]

Codecov Report

Attention: 3 lines in your changes are missing coverage. Please review.

Comparison is base (537a267) 84.42% compared to head (a142da5) 82.84%.

Files	Patch %	Lines
pyecsca/sca/target/leakage.py	0.00%	3 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #55 +/- ## ========================================== - Coverage 84.42% 82.84% -1.57% ========================================== Files 82 82 Lines 6975 6975 Branches 1307 1307 ========================================== - Hits 5888 5778 -110 - Misses 838 948 +110 Partials 249 249 ```

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