Bump version
Bump version

1.29.4 got released off a side-branch, but bump version here too.

danny-ku/pango,Distrotech/pango,Distrotech/pango,kari-lentz/alpha-pango,danny-ku/pango,danny-ku/pango,kari-lentz/alpha-pango,kari-lentz/alpha-pango,Distrotech/pango,kari-lentz/alpha-pango