chore: Add WASM test coverage for SigningAlg tests

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 81.52%. Comparing base (2df2f1d) to head (bac97d7). Report is 1 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #699 +/- ## ======================================= Coverage 81.52% 81.52% ======================================= Files 104 104 Lines 30614 30614 ======================================= Hits 24958 24958 Misses 5656 5656 ```

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