Update SwiftyStoreKit.podspec

SwiftyStoreKit.podspec

@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name         = 'SwiftyStoreKit'
-  s.version      = '0.15.1'
+  s.version      = '0.16.0'
   s.summary      = 'Lightweight In App Purchases Swift framework for iOS 8.0+, tvOS 9.0+ and macOS 10.10+'
   s.license      = 'MIT'
   s.homepage     = 'https://github.com/bizz84/SwiftyStoreKit'
@@ -8,6 +8,7 @@ Pod::Spec.new do |s|
   s.ios.deployment_target = '8.0'
   s.osx.deployment_target = '10.10'
   s.tvos.deployment_target = '9.0'
+  s.watchos.deployment_target = '6.2'
   s.swift_version = '5.0'
   s.source       = { :git => "https://github.com/bizz84/SwiftyStoreKit.git", :tag => s.version }