fix invalid #expired? method

Conflicts:
	src/http/cookie.cr

src/http/cookie.cr

@@ -50,6 +50,17 @@ module HTTP
       end
     end
 
+    # returns the expiration status of this cookie as a `Bool` given a creation time
+    def expired?(time_reference = @creation_time)
+      if @max_age == 0.seconds
+        true
+      elsif (time = expiration_time(time_reference)) && time < Time.now
+        true
+      else
+        false
+      end
+    end
+
     # :nodoc:
     module Parser
       module Regex