Better version sorting

[Roy-Orbison]

Have remote list sorted correctly by default for better readability latest version selection (in case -rc* versions are used).

Previous output of ubuntu-mainline-kernel -r v5.8. --rc:

Downloading index from kernel.ubuntu.com
v5.8.0-rc1      v5.8.0-rc2      v5.8.0-rc3      v5.8.0-rc4      v5.8.0-rc5      v5.8.0-rc6      v5.8.0-rc7      v5.8.1
v5.8.2          v5.8.3          v5.8.4          v5.8.5          v5.8.6          v5.8.7          v5.8.8          v5.8.9
v5.8.10         v5.8.0

Updated output:

Downloading index from kernel.ubuntu.com
v5.8.0-rc1      v5.8.0-rc2      v5.8.0-rc3      v5.8.0-rc4      v5.8.0-rc5      v5.8.0-rc6      v5.8.0-rc7      v5.8.0
v5.8.1          v5.8.2          v5.8.3          v5.8.4          v5.8.5          v5.8.6          v5.8.7          v5.8.8
v5.8.9          v5.8.10

[Roy-Orbison]

@pimlie The Perl dependency is gone, is there something else?

[pimlie]

Nice work on parsing the versions here, much cleaner this way!

Have two small remarks, mainly to avoid confusion in the future.

Btw, I guess this pr would resolve this issue too? #39

[Roy-Orbison]

I don't know if this will completely resolve #39, it may be affected by #58.

[pimlie]

Thanks for the changes!