Update cookie.rb (#2092)

dchandekstark · web-flow · commit 287fe435720b · 2023-07-15T18:25:08.000+12:00
Backports commit 9cad48e to version 2.2
diff --git a/lib/rack/session/cookie.rb b/lib/rack/session/cookie.rb
@@ -5,6 +5,7 @@
 require_relative 'abstract/id'
 require 'json'
 require 'base64'
+require 'delegate'
 
 module Rack
 
