argon2: bump cpufeatures to v0.3 (#847)

Author: tarcieri

argon2/Cargo.toml

@@ -27,7 +27,7 @@ password-hash = { version = "0.6.0-rc.12", optional = true, features = ["phc"] }
 zeroize = { version = "1", default-features = false, optional = true }
 
 [target.'cfg(any(target_arch = "x86", target_arch = "x86_64"))'.dependencies]
-cpufeatures = "0.2.17"
+cpufeatures = "0.3"
 
 [dev-dependencies]
 hex-literal = "1"