react-studio: update livecheck

Casks/r/react-studio.rb

@@ -10,17 +10,17 @@ cask "react-studio" do
 
   livecheck do
     url "https://c1.neonto.com/studio/verinfo_reactstudio"
-    strategy :page_match do |page|
-      json_data = JSON.parse(page)
-      next if json_data.blank?
-
-      version = json_data["latestVersionDescription"]
-      build = json_data["latestVersion"].to_i
+    strategy :json do |json|
+      version = json["latestVersionDescription"]
+      build = json["latestVersion"]&.to_i
+      next if version.blank? || build.blank?
 
       "#{version},#{build}"
     end
   end
 
+  depends_on macos: ">= :sierra"
+
   app "React Studio.app"
 
   zap trash: [