Support Swift Crypto v4

Author: fpseverino

Package.swift

@@ -40,7 +40,7 @@ let package = Package(
         .package(url: "https://github.com/apple/swift-log.git", from: "1.10.1"),
         .package(url: "https://github.com/apple/swift-argument-parser.git", from: "1.7.0"),
         .package(url: "https://github.com/apple/swift-collections.git", from: "1.1.4"),
-        .package(url: "https://github.com/apple/swift-crypto.git", from: "3.0.0"),
+        .package(url: "https://github.com/apple/swift-crypto.git", "3.0.0"..<"5.0.0"),
         .package(url: "https://github.com/grpc/grpc-swift-2.git", from: "2.3.0"),
         .package(url: "https://github.com/grpc/grpc-swift-nio-transport.git", from: "2.4.4"),
         .package(url: "https://github.com/grpc/grpc-swift-protobuf.git", from: "2.2.0"),