debian/changelog: bump version to allow versioned depends
!21 (merged) [1] adds new key in a GSettings schema. Bump version (but don't release it) to allow versioned depends from packages that make use of new key.
[1] !21 (merged)
!21 (merged) [1] adds new key in a GSettings schema. Bump version (but don't release it) to allow versioned depends from packages that make use of new key.
[1] !21 (merged)