Adding display swap option to Google Fonts

Author: guillaumebriday

_layouts/default.html

@@ -7,7 +7,7 @@
       <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
 
       <!-- Fonts -->
-      <link href="https://fonts.googleapis.com/css?family=Nunito" rel="stylesheet" type="text/css">
+      <link href="https://fonts.googleapis.com/css?family=Nunito&display=swap" rel="stylesheet" type="text/css">
 
       <!-- Styles -->
       <link rel="stylesheet" href="assets/application.css">