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 https://github.com/jquery/jquery/pull/5211 Ref https://github.com/jquery/api.jquery.com/issues/1221

[mgol]

See:

• https://github.com/jquery/jquery/issues/5201
• https://github.com/jquery/api.jquery.com/issues/1221

[mgol]

PR: #528