[NonGNU ELPA] Boxquote version 2.3

[ELPA update]

Version 2.3 of package Boxquote has just been released in NonGNU ELPA.
You can now find it in M-x package-list RET.

Boxquote describes itself as:
  Quote text with a semi-box.

More at https://elpa.nongnu.org/nongnu/boxquote.html