title: what's the different between redis.v4 and redis.v5 in golang package
body: <p>Currently I'm doing some project to build cache data using Redis using Go language.
  I'm using Redis version 4 from <a href="https://gopkg.in/redis.v4" rel="nofollow noreferrer">gopkg.in/redis.v4</a>. We have the plan to upgrade it to <a href="https://gopkg.in/redis.v5" rel="nofollow noreferrer">redis version 5</a>. </p>
  
  <p>But I've the following issue before attempt to update version : </p>
  
  <ul>
  <li>What is the good thing about redis 5 compare to redis 4</li>
  <li>I tried to find the changelog but I could not, any changelog for this update?</li>
  <li>any changes to make after updating the redis 4 to redis 5 ? like function ?</li>
  </ul>
  
  <p>Hopefully someone could help me regarding this issue. Any help would be appreciate.</p>