Modernize `.arclint` file

Summary:
Modernize the `.arclint` file. Specifically:

- Add a (native) JSON linter (see D9628)
- Add `xhpast.php-version` and `xhpast.php-version.windows` configuration (see D9576)
- Sort `.arclint` linters alpahbetically

Test Plan: N/A

Reviewers: epriestley, #blessed_reviewers

Reviewed By: epriestley, #blessed_reviewers

Subscribers: epriestley, Korvin

Differential Revision: https://secure.phabricator.com/D9801