[GNU ELPA] Boxy-Headings version 2.1.6

[ELPA update]

Version 2.1.6 of package Boxy-Headings has just been released in GNU ELPA.
You can now find it in M-x list-packages RET.

Boxy-Headings describes itself as:

  ================================
  View org files in a boxy diagram
  ================================

More at https://elpa.gnu.org/packages/boxy-headings.html

## Summary:

                              ━━━━━━━━━━━━━━━
                               BOXY HEADINGS
                              ━━━━━━━━━━━━━━━


  View org files as a boxy diagram.

  `package-install RET boxy-headings RET'


  1 Usage
  ═══════

  1.1 `boxy-headings'
  ───────────────────

    To view all headings in an org-mode file as a boxy diagram, use the
    interactive function `boxy-headings'

    Suggested keybinding:
    ┌────
    │ (define-key org-mode-map (kbd "C-c r o") 'boxy-headings)
    └────

    To modify the relationship between a headline and its parent, add the
    property REL to the child headline. Valid values are:
    • on-top
    • in-front
    • behind
    • above
    • below
    • right
    • left

    The tooltip for each headline shows the values that would be displayed
    if the org file was in org columns view.

## Recent NEWS:

# -*- mode: org -*-

* 2.1.2

- Added NEWS file
- Fixed bug where sibling relationships were not being added

* 2.1.1

v2.1.1

Fix typo that caused 'left' and 'right' to not be valid REL property values.

See merge request tygrdev/boxy-headings!5

* 2.1.0

v2.1.0

Bug fixes
- Added org 9.3 dependency for emacs 26.

Improvements
- Generalized `REL` property using regex to match, for example, all of "in 
front" "in front of" and "in-front".
- Added max visibility option

Fixes #2

See merge request tygrdev/boxy-headings!4

* 2.0.0

2.0.0

- Renamed boxy-headlines to boxy-headings
- Standardized defface calls

See merge request tygrdev/boxy-headings!3

* 1.0.2

Updated elpaignore

See merge request tygrdev/boxy-headlines!2

* 1.0.1

1.0.1

- Added changes from Stefan Monnier
- Changed from cl-defmethod to defun

See merge request tygrdev/boxy-headlines!1