Tweak for Pro compat

Pro-Changes.md

@@ -4,6 +4,11 @@
 
 Please see [http://sidekiq.org/](http://sidekiq.org/) for more details and how to buy.
 
+5.0.1
+---------
+
+- Sidekiq::JobSet#scan and #find_job APIs have been promoted to Sidekiq OSS. [#4259]
+
 5.0.0
 ---------
 

lib/sidekiq/api.rb

@@ -525,7 +525,7 @@ module Sidekiq
       Sidekiq.redis { |c| c.zcard(name) }
     end
 
-    def scan(match, count: 100)
+    def scan(match, count = 100)
       return to_enum(:scan, match) unless block_given?
 
       match = "*#{match}*" unless match.include?("*")