Freezing spm versions.

Author: yaroslavyaroslav

Package.swift

@@ -20,8 +20,8 @@ let package = Package(
         .library(name: "web3swift", targets: ["web3swift"])
     ],
     dependencies: [
-        .package(url: "https://github.com/attaswift/BigInt.git", from: "5.3.0"),
-        .package(url: "https://github.com/krzyzanowskim/CryptoSwift.git", from: "1.5.1")
+        .package(url: "https://github.com/attaswift/BigInt.git", .upToNextMinor(from: "5.3.0")),
+        .package(url: "https://github.com/krzyzanowskim/CryptoSwift.git", .upToNextMinor(from: "1.5.1"))
     ],
     targets: [
         .target(name: "secp256k1"),