[issue36738] Add 'array_hook' for json module

Change by matt farrugia : -- keywords: +patch pull_requests: +12906 stage: -> patch review ___ Python tracker <https://bugs.python.org/issue36738> ___ ___ Py

[issue36738] Add 'array_hook' for json module

New submission from matt farrugia : The json module allows a user to provide an `object_hook` function, which, if provided, is called to transform the dict that is created as a result of parsing a JSON Object. It'd be nice if there was something analogous for JSON Arrays: an `array_hook