title: How to use OR / AND in graphql query filter or make a case insensitive filter?
body: <p>Just like the post ask I need to be able to search with 3 possible scenarios. I need to have all uppercase, or lowercase, or normal casing. </p>
  
  <p>If that is not possible is there a way to do a case insensitive filter instead?</p>
  
  <pre><code>  allMarkdownRemark(filter: { brand: { eq: $normalBrand } }) { //==&gt; Need more here
          edges {
              node {
                  webImages {
                      url
                  }
              }
          }
      }
  </code></pre>
  
  <p>I found some people doing this:</p>
  
  <pre><code>filter: { OR: [
    {brand: { eq: $normalBrand }}, 
    {brand: { eq: $normalBrand2 }}, 
    {brand: { eq: $normalBrand3 }}
  ]}
  </code></pre>
  
  <p>But it does not work for me</p>