use kwargs to avoid hash slicing

we can use kwargs in this case to avoid values_at and except calls on
the options hash

actionview/lib/action_view/digestor.rb

@@ -57,9 +57,9 @@ def compute_and_store_digest(cache_key, options) # called under @@digest_monitor
 
     attr_reader :name, :finder, :options
 
-    def initialize(options)
-      @name, @finder = options.values_at(:name, :finder)
-      @options = options.except(:name, :finder)
+    def initialize(name:, finder:, **options)
+      @name, @finder = name, finder
+      @options = options
     end
 
     def digest