Wrong global variable in give-ajax.js in latest version of plugin (2.2.4)

[codep0et]

Current Behavior

When you try to login on a give form, you have an infinite loading that goes on because the global ajax url for the login is an object.

Expected Behavior

I expect to be logged in

Steps to Reproduce

1. Go on a form donation page
2. Try to log in

Acceptance Criteria

• If you click login, the data gets submitted to the write ajax url

Simple fix is to change the function from Give.fn.getGlobal('ajaxurl') to Give.fn.getGlobalVar('ajaxurl') line 115 of give-ajax.js (https://github.com/WordImpress/Give/blob/release/2.3.0/assets/src/js/frontend/give-ajax.js#L115)