libsecp256k1 v0.4.1 released

Hello,

Today we'd like to announce the release of version 0.4.1 of libsecp256k1:

     https://github.com/bitcoin-core/secp256k1/releases/tag/v0.4.1

This release slightly increases the speed of the ECDH operation and significantly enhances the performance of many library functions when using the default configuration on x86_64.

For a list of changes, see the CHANGELOG.md:

     https://github.com/bitcoin-core/secp256k1/blob/master/CHANGELOG.md