Fill & warn against jQuery.Deferred.getStackHook

[mgol]

jQuery.Deferred.getStackHook is being renamed to jQuery.Deferred.getErrorHook in 3.7.0; the old API will be removed in 4.0.0.

Ref jquery/jquery#5211
Ref jquery/api.jquery.com#1221

[mgol]

See:

• Use jQuery.Deferred.getErrorHook in 3.7.0, deprecate jQuery.Deferred.getStackHook jquery#5201
• Document jQuery.Deferred.getErrorHook & jQuery.Deferred.getStackHook api.jquery.com#1221

[mgol]

PR: #528