Yanked v0.7 crypto-mac crate causes build problem

[Cem Eliguzel]

I face a problem due to the yanked v0.7 crypto-mac crate
There is this dependency tree causing the problem:
crypto-mac <- hmac <- curv <- multi-party-ecdsa

[Denis Varlakov]

Hi @rimbi, we've fixed the problem by releasing curv v0.7.1 with bumped hmac. multi-party-ecdsa should be buildable now!