Add Motion subdependency to SwiftPM manifest file

Package.swift

@@ -7,9 +7,13 @@ let package = Package(
     products: [
         .library(name: "Material", targets: ["Material"])
     ],
+    dependencies: [
+        .package(url: "https://github.com/AccioSupport/Motion.git", .branch("development")),
+    ],
     targets: [
         .target(
             name: "Material",
+            dependencies: ["Motion"],
             path: "Sources"
         )
     ]