fixed spm dependecies

Author: AnnaYatsun1

Package.swift

@@ -4,28 +4,32 @@
 import PackageDescription
 
 let package = Package(
-  name: "Web3swift",
-  products: [
-    // Products define the executables and libraries produced by a package, and make them visible to other packages.
-    .library(name: "web3swift", targets: ["web3swift"]),
+    name: "Web3swift",
+    platforms: [
+        .macOS(.v10_12), .iOS(.v11),
     ],
-  dependencies: [
-    .package(url: "https://github.com/attaswift/BigInt.git", from: "5.2"),
-    .package(url: "https://github.com/mxcl/PromiseKit.git", from: "6.15.3"),
-    .package(url: "https://github.com/daltoniam/Starscream.git", from: "4.0.4"),
-    .package(url: "https://github.com/krzyzanowskim/CryptoSwift.git", from: "1.4.0"),
+    products: [
+        // Products define the executables and libraries produced by a package, and make them visible to other packages.
+        .library(name: "web3swift", targets: ["web3swift"]),
     ],
-  targets: [
-    // Targets are the basic building blocks of a package. A target can define a module or a test suite.
-    // Targets can depend on other targets in this package, and on products in packages which this package depends on.
-    .target(name: "secp256k1"),
-    .target(
-      name: "web3swift",
-      dependencies: ["BigInt", "secp256k1", "PromiseKit", "Starscream", "CryptoSwift"],
-      exclude: [
-        ]),
-    .testTarget(
-      name: "web3swiftTests",
-      dependencies: ["web3swift"]),
+    
+    dependencies: [
+        .package(url: "https://github.com/attaswift/BigInt.git", from: "5.2.0"),
+        .package(url: "https://github.com/mxcl/PromiseKit.git", from: "6.15.3"),
+        .package(url: "https://github.com/daltoniam/Starscream.git", from: "4.0.4"),
+        .package(url: "https://github.com/krzyzanowskim/CryptoSwift.git", from: "1.4.0"),
+    ],
+    targets: [
+        // Targets are the basic building blocks of a package. A target can define a module or a test suite.
+        // Targets can depend on other targets in this package, and on products in packages which this package depends on.
+        .target(name: "secp256k1"),
+        .target(
+            name: "web3swift",
+            dependencies: ["BigInt", "secp256k1", "PromiseKit", "Starscream", "CryptoSwift"],
+            exclude: [
+            ]),
+        .testTarget(
+            name: "web3swiftTests",
+            dependencies: ["web3swift"]),
     ]
 )