scihubeva: add livecheck and depends_on

Casks/s/scihubeva.rb

@@ -10,6 +10,14 @@ cask "scihubeva" do
   desc "Cross-platform Sci-Hub GUI application powered by Python and Qt"
   homepage "https://github.com/leovan/SciHubEVA"
 
+  livecheck do
+    url :url
+    strategy :github_latest
+  end
+
+  auto_updates true
+  depends_on macos: ">= :big_sur"
+
   app "Sci-Hub EVA.app"
 
   zap trash: [