(Niche) Keyboard compose key causes `·` typed and autocompleted.

[WebCoder49]

When I tap the Compose Key while in a code-input element, the compose key's placeholder character (·) is typed completely and composition of characters no longer works. Holding down the compose key just causes the placeholder character to repeat.

This occurs in the code-input tester for both highlight.js and Prism.js, which has loaded all plugins, in the CodePen demo where fewer plugins are imported, and the no-plugins CodePens (1, 2), all of which are using code-input v2.3.1.

I have tested it on Firefox 130.0.1 (64-bit) through Wayland on EndeavourOS based on Arch Linux (KDE Plasma 6.1.5, KDE Frameworks 6.6.0, Qt 6.7.2, Linux Kernel 6.10.10-arch1-1 (64-bit)) today.

[WebCoder49]

Partly waiting on #124 whose potential fix will currently fix this, to see if the fix needs to be adjusted; it may cause other issues too so be careful.