Merge pull request hyperledger-indy#967 from jovfer/master

Update indy-crypto.

Author: Vyacheslav

libindy/Cargo.lock

@@ -41,7 +41,7 @@ memzero_sodium = ["sodiumoxide"]
 fatal_warnings = []
 
 [dependencies]
-indy-crypto = { version = "=0.4.1-dev-50", optional = true }
+indy-crypto = { version = "=0.4.1-dev-55", optional = true }
 int_traits = { version = "0.1.1", optional = true }
 digest = "0.6.2"
 env_logger = "0.5.10"