Updated for latest Scenes version

* Updated to Igis 1.4.0 and Scenes 1.1.6
* Updated to swift-tools-version:5.7
* Added newly required Swift Atomics

Author: DBenYaakov

Package.swift

@@ -1,16 +1,18 @@
-// swift-tools-version:5.0
+// swift-tools-version:5.7
 // The swift-tools-version declares the minimum version of Swift required to build this package.
 
 import PackageDescription
 
 let package = Package(
     name: "ScenesShell",
     dependencies: [
+      .package(url: "https://github.com/apple/swift-atomics.git", from: "1.0.2")
     ],
     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: "ScenesShell"),
+        .executableTarget(
+          name: "ScenesShell",
+          dependencies: [.product(name: "Atomics", package: "swift-atomics")])
     ]
 )

dylib.manifest

@@ -1,2 +1,2 @@
-Igis		1.3.7
-Scenes		1.1.5
+Igis		1.4.0
+Scenes		1.1.6