meson: bump meson requirement to >= 0.59

meson: bump meson requirement to >= 0.59

For monorepo build and ugly/bad, for advanced feature
option API like get_option('xyz').required(..) which
we use in combination with the 'gpl' option.

For rest of modules for consistency (people will likely
use newer features based on the top-level requirement).

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1084>