Use installer command instead of runProgram

Author: cmcgee1024

Sources/MacOSPlatform/MacOS.swift

@@ -117,7 +117,7 @@ public struct MacOS: Platform {
 
         if ctx.mockedHomeDir == nil {
             await ctx.print("Extracting the swiftly package...")
-            try runProgram("installer", "-pkg", "\(archive)", "-target", "CurrentUserHomeDirectory")
+            try await sys.instaler(pkg; archive, targt: "CurrentUserHomeDirectory")
             try? await sys.pkgutil(.volume(userHomeDir)).forget(packageId: "org.swift.swiftly").run(self)
         } else {
             let installDir = userHomeDir / ".swiftly"