In October 2019, Perl6 was renamed to "Raku".
The syntax is renamed to **"Raku"**, however, I don't know if you prefer a name that also includes "Perl6", such as **"Raku (Perl6)"** or **"Raku/Perl6"**.
I also add the new extensions and update the extension in the test file.
Any inconvenience with this diff don't hesitate to notify.
**Sources:**
* Raku Programming Language: https://raku.org/
* Raku Documentation: https://docs.perl6.org/
* The Perl Foundation News. TPF response to Raku rename: https://news.perlfoundation.org/post/tpf-response-raku-rename
* LWN.net. Perl 6 renamed to Raku: https://lwn.net/Articles/802329/
**NOTE:** This was sent by nvisser on GitHub: https://github.com/KDE/syntax-highlighting/pull/24