[Feature] Automatically compress old versions of apps

[octopushugger]

Feature Request

I'd like Scoop to automatically compress old versions with lzma2. So my app folder would look something like:

current
new version
old version.7z
older version.7z

Saving space without losing rollback functionality. I'm sure other users would appreciate the option to enable/disable this and/or configure the compression type. I'd personally prefer fast-lzma2 but since normal 7zip doesn't come with it and adding it to scoop is probably more complexity than this feature needs I think normal lzma2 is good.