FEAT: Update libsecp256k1 to v0.5.0

[MementoRC]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 33.68%. Comparing base (ddfa9bb) to head (16c300a).
Report is 2 commits behind head on master.

❗ Current head 16c300a differs from pull request most recent head 6e0bb1a

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Additional details and impacted files

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  Coverage   33.68%   33.68%           
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  Files          12       12           
  Lines         567      567           
  Branches       67       67           
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  Hits          191      191           
  Misses        376      376           

[MementoRC]

@ofek I am updating the libsecp256k1 to v0.5.0 and also removing setting the COINCURVE_UPSTREAM_REF in several location. Since we are using pyproject, we can define only there. There is still a reference (the 0.4.1) in the CMakeLists.txt, in the odd case someone wouldn't use pyproject