Add jQuery 4 compatibility

[PikachuEXE]

The latest release (1.6.7) does not appear to be compatible with the recently released jQuery 4.

Codepen (jQuery 3.x)
https://codepen.io/PikachuEXE/pen/OPRxxjO

Codepen (jQuery 4.x)
https://codepen.io/PikachuEXE/pen/emdGGEo

I guess the code right now is using too much Deprecated APIs removed removed in 4.x

jquery-timeago/jquery.timeago.js

Line 120 in f635f15

var s = $.trim(iso8601);

https://blog.jquery.com/2026/01/17/jquery-4-0-0/