Bump tvOS version to 13.0 (#31)

Author: sunitaprajapati89

Package.swift

@@ -8,7 +8,7 @@ let package = Package(
     platforms: [
         .macOS("10.15"),
         .iOS("13.0"),
-        .tvOS("11.0"),
+        .tvOS("13.0"),
         .watchOS("7.1")
     ],
     products: [