Fix warning about deallocate(capacity:) deprecation

Author: jonblatho

Sources/JWA/HMAC/HMACCommonCrypto.swift

@@ -5,7 +5,7 @@ import CommonCrypto
 extension HMACAlgorithm: SignAlgorithm, VerifyAlgorithm {
   public func sign(_ message: Data) -> Data {
     let context = UnsafeMutablePointer<CCHmacContext>.allocate(capacity: 1)
-    defer { context.deallocate(capacity: 1) }
+    defer { context.deallocate() }
 
     key.withUnsafeBytes() { (buffer: UnsafePointer<UInt8>) in
       CCHmacInit(context, hash.commonCryptoAlgorithm, buffer, size_t(key.count))