Catalina is actually already EOL as of July 2022 but we dont need
anything from newer releases that isn't detected at runtime. Going to
Catalina allows us to use a better format for the generated DMG (UMNO
instead of ULFO which compresses better).
It's easier to type, and cuter.
Also, most, if not all of the TUI parts of
kitty's kittens will eventually be re-written into kitten.
The only downside I can see is that we cant tab complete kitty
anymore, but hopefully there will be less reason to run kitty
from the shell as command line tools migrate to kitten.
Meowrrrr!!!
This required the kitty package to be moved from Frameworks to
Resources, because Apple cant codesign .pyc files and its notarization
requires everything in Frameworks to be signed. Hopefully that does not
break anything. Also removed the kitty-deref-symlink since it is not
needed anyway and was only present for backwards compatibility.
Fixes#2040
