tag new (2.0?) release with libsignon-glib 2.0 support

There's last release 1.0 doesn't contain the changes necessary to support libsignon-glib 2.0. Can you tag a new release (probably 2.0)?

You could also restrict the libsignon-glib dependency in meson.build, if the changes aren't backwards compatible with older versions:

libsignon_dep = dependency ('libsignon-glib', version: '>=2.0')

I intend to update the fedora package for this project, and being able to target a release tag instead of a snapshot commit would be preferable.