Make BigInt dependency more flexible

Author: bogdan

Package.swift

@@ -12,7 +12,7 @@ let package = Package(
         .library(name: "web3swift", targets: ["web3swift"])
     ],
     dependencies: [
-        .package(url: "https://github.com/attaswift/BigInt.git", .upToNextMinor(from: "5.4.0")),
+        .package(url: "https://github.com/attaswift/BigInt.git", .upToNextMajor(from: "5.4.0")),
         .package(url: "https://github.com/krzyzanowskim/CryptoSwift.git", from: "1.5.1"),
         .package(name: "secp256k1", url: "https://github.com/GigaBitcoin/secp256k1.swift", .upToNextMinor(from: "0.10.0"))
     ],