Webfont Loader for Google fonts. (just swapping the: WebFontConfig={ typekit: {id: 'myKitId'} };

Web Font Async Loader

WebFontConfig={
    google:{families:["Lato:400,700,300,100:latin"]}
  };
  
  (function(){
    var wf = document.createElement("script");
    wf.src = ("https:" == document.location.protocol ? "https":"http") + 
             "://ajax.googleapis.com/ajax/libs/webfont/1/webfont.js";
    wf.type="text/javascript";
    wf.async="true";
    var t = document.getElementsByTagName("script")[0];
    t.parentNode.insertBefore(wf, t)
})();