Bump minimum supported iOS version to 13.0 and macOS version to 10.13

Author: hamchapman

Package.swift

@@ -4,7 +4,7 @@ import PackageDescription
 
 let package = Package(
     name: "SwiftCBOR",
-    platforms: [.macOS(.v10_10), .iOS(.v10)],
+    platforms: [.macOS(.v10_13), .iOS(.v13)],
     products: [
         .library(name: "SwiftCBOR", targets: ["SwiftCBOR"])
     ],

SwiftCBOR.podspec

@@ -11,8 +11,8 @@ Pod::Spec.new do |s|
   s.source = { git: 'https://github.com/unrelentingtech/SwiftCBOR.git', tag: "v#{s.version}" }
   s.swift_version = '5.0'
 
-  s.ios.deployment_target = '11.0'
-  s.osx.deployment_target = '10.12'
+  s.ios.deployment_target = '13.0'
+  s.osx.deployment_target = '10.13'
 
   s.source_files = 'Sources/**/*.{swift,h}'