add MacPaw to sponsors

Author: zkochan

src/pages/index.js

@@ -115,6 +115,9 @@ const Showcase = props => {
               <a href={addUTM("https://devowl.io/")} target="_blank">
                 <img style={{padding: '20px'}} width="240" alt="devowl" src="/img/users/devowlio.svg" />
               </a>
+              <a href={addUTM("https://macpaw.com/")} target="_blank">
+                <img style={{padding: '20px'}} width="240" alt="MacPaw" src="/img/users/macpaw.svg" />
+              </a>
             </div>
           </div>
           <div>