fix(links): Open iframe links in new window

source/ui/src/routes/index.svelte

@@ -15,8 +15,8 @@ import Tokens from '$lib/Tokens.svelte';
     different styles, 4 bars at a time.
   </p>
   <p>
-    Developed by <a href="https://twitter.com/ronvoluted">Ron Au</a> and
-    <a href="https://twitter.com/DrTBehrens">Tristan Behrens</a>.
+    Developed by <a href="https://twitter.com/ronvoluted" rel="noopener" target="_blank">Ron Au</a> and
+    <a href="https://twitter.com/DrTBehrens" rel="noopener" target="_blank">Tristan Behrens</a>.
   </p>
   <p>Have fun! And always feel free to send us some feedback and share your compositions!</p>
   <section id="options">