Specifying a version for watchOS and tvOS

Author: vegather

Package.swift

@@ -7,7 +7,9 @@ let package = Package(
     name: "Disruptive",
     platforms: [
         .iOS(.v13),
-        .macOS(.v10_15)
+        .macOS(.v10_15),
+        .watchOS(.v6),
+        .tvOS(.v13)
     ],
     products: [
         // Products define the executables and libraries a package produces, and make them visible to other packages.