dhkem: bump hkdf to v0.13 (#339)

Release PR: RustCrypto/KDFs#195

Author: tarcieri

dhkem/Cargo.toml

@@ -14,7 +14,7 @@ keywords = ["crypto", "ecdh", "ecc"]
 readme = "README.md"
 
 [dependencies]
-hkdf = "0.13.0-rc.5"
+hkdf = "0.13"
 kem = "0.3"
 rand_core = "0.10"
 
@@ -30,7 +30,7 @@ zeroize = { version = "1.8.1", optional = true, default-features = false }
 [dev-dependencies]
 getrandom = { version = "0.4", features = ["sys_rng"] }
 hex-literal = "1"
-hkdf = "0.13.0-rc.5"
+hkdf = "0.13"
 sha2 = "0.11"
 
 [features]