title: Redis redis.createClient() in Typescript
body: <p>I was trying to connect Redis (v4.0.1) to my express server with typescript but having a bit issue. Am learning typescript. It's showing redlines on <strong>host</strong> inside <strong>redis.createClient()</strong> Can anyone help me out?</p>
  <pre><code>const host = process.env.REDIS_HOST;
  const port = process.env.REDIS_PORT;
  const redisClient = redis.createClient({
    host,
    port,
  });
  </code></pre>
  <pre><code>Argument of type '{ host: string | undefined; port: string | undefined; }' is not assignable to parameter of type 'Omit&lt;RedisClientOptions&lt;never, RedisScripts&gt;, &quot;modules&quot;&gt;'.
    Object literal may only specify known properties, and 'host' does not exist in type 'Omit&lt;RedisClientOptions&lt;never, RedisScripts&gt;, &quot;modules&quot;&gt;'.ts(2345)
  </code></pre>