Load instabug websdk asynchronously

instabug-web-sdk.js

(function(i,n,s,t,a,b,u,g) {
    i['InstabugObject'] = s;
    i[s] = i[s] || {token:a}
    b = n.getElementsByTagName('head')[0];
    u = n.createElement('script');
    u.sync = 1;
    u.src = t;
    u.id = 'instabugSDK';
    b.appendChild(u);
})(
    window,
    document, 
    '_instabug', 
    'https://s3.amazonaws.com/instabug-pro/sdk_releases/instabugsdk-1.0.0.min.js?1486903903',
    'YOUR_APP_TOKEN'
    );