[GNU ELPA] Transient-Cycles version 2.1

Version 2.1 of package Transient-Cycles has just been released in GNU ELPA.
You can now find it in M-x list-packages RET.

Transient-Cycles describes itself as:

  ==============================================
  Define command variants with transient cycling
  ==============================================

More at https://elpa.gnu.org/packages/transient-cycles.html

## Summary:

  This package provides four global minor modes:

  - `transient-cycles-buffer-siblings-mode'
    Enhances buffer switching commands by adding transient cycling.
    After typing 'C-x b', 'C-x 4 C-o', 'C-h i' and others, you can use
    <left>/<right> to switch between other closely related buffers.
    For example, after using 'C-x b' to switch to a buffer which has a
    (possibly indirect) clone, <right> will switch to the clone, and a
    subsequent <left> will take you back.

## Recent NEWS:

Ver 2.1 2026/06/25 Sean Whitton
    In `transient-cycles-shells-jump', match `shell-mode' or `eshell-mode'
    exactly instead of using `derived-mode-p'.

Ver 2.0 2025/06/25 Sean Whitton
    New minor mode, `transient-cycles-shells-mode'.
    New macro `transient-cycles-define-buffer-switch'.
    New command to restart transient cycling (not bound by default):
    `transient-cycles-cmd-transient-cycles-siblings-from-here'.

Ver 1.1 2025/02/25 Sean Whitton
    Replace uses of `when-let' with `when-let*'.

Ver 1.0 2022/04/10 Sean Whitton
    Initial release.
    Thanks to Protesilaos Stavrou for testing and docs feedback.