Log Message:
ruby-mini_portile2: update to 2.8.8.

Upstream changes:
 https://github.com/flavorjones/mini_portile/releases/tag/v2.8.8

2.8.8 / 2024-11-14

Improved

 * Raise an exception with a clear error message when xzcat is needed but is
   not installed. (#152) @flavorjones