ChromeXt v3.9.0

While many custom browsers are starting to support extensions, ChromeXt remains an elegant, lightweight solution for userscripts and DevTools.

Summary of this update:

1. Size within 130 kB;
2. Drop support for Edge (now supports extensions, #217) and Samsung (broken interface, #214) browsers, to reduce the maintenance burden;
3. Retain support for the latest versions of the browsers kept in our declared lists.