Merge branch 'master' into ci-add-gitlab
* master: Update src/ffi.rs s/EcdhHashFunction/EcdhHashFn revert unrelated change refactor ecdh_raw fix ecdh ffi fix rand tests remove schnorr support
* master: Update src/ffi.rs s/EcdhHashFunction/EcdhHashFn revert unrelated change refactor ecdh_raw fix ecdh ffi fix rand tests remove schnorr support