1.4.2rc1

This is the first release candidate for the 1.4.2 stable release of ARA.

This release comes sooner than expected in order to fix a regression when
installing ara with the latest version of dynaconf (3.0.0) due to a change in
the preferred yaml package.

For more information about this issue, see https://github.com/ansible-community/ara/issues/146

Built-in reporting interface
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- Improvements to the interface scaling and rendering for mobile devices
- The playbook index has been refactored from a list of cards to a table view
  and searching/filtering controls are no longer hidden in a submenu
- Sorting by playbook date and duration is now built into the table headers
- The Ansible CLI arguments are now available from the playbook index
- The host stats summary now displays colors and icons for the different statuses
- Task result columns were re-ordered and statuses now have colors and icons
- Long task results or host facts should no longer render off-screen