Use lzma instead of pylzma

[ksz16]

Could you consider a new version that uses the built-in lzma module instead of pylzma?
In the new versions of Python (3.13 and 3.14 - tested on Arch Linux and Fedora) attempt to build pylzma ends with an error.
For this reason I had to switch to version 1.1.1 which is the latest version that does not use pylzma.
The application itself still works flawlessly - the only problem is the pylzma module used.

[emkor]

Hey, thanks for proposing the changes and for using this tool!

I can see the issue, however I'm not having enough spare time currently to work on this issue, but I might have in ~singular weeks from now.

If there's more urgency to it, feel free to submit PR and I can try to take a look at it in some time.

Again, thanks for noticing the issue!

[ksz16]

It turned out that using the built-in lzma module would not be sufficient in this case.
But I found the py7zr library which should replace pylzma.
I submitted a pull request - if you find some free time, take a look.
Important note: I am not a Python expert, so please review my PR carefully 😃