Release tag for Subsurface 4.3

This is the fourth Qt based release of Subsurface
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1

iQEcBAABAgAGBQJUkkhcAAoJEMg7B0XfGI3+ATIIAJrT1qXm/qipIPl4uYVMpuaK
wjiQpVmn04UM1nG75ZtUwGyxbgkruUKmNZe4HgFquZhsFU6xc8+/wTsuI43Gi7Ka
JnSC0NpebEa8GJFTtmb6Betc7nCD4/fLXZf4zkWWMAhNWR1LGNlh5r+nDHum19SY
gpDP4Tis7aZApjkC6PSQY5oUELTPJ5bsdYwVUT2D2Z+aFbAz3SNObjKBz+sWs3Tx
k5pMKtoFPgdFhfUPDyzg8/qjdKijEgGAxhdB7xfmAPxReu/951ZQNf+PkeTYBSkj
sKItaobSKh7tAG2bE++/AZTouyPTyX2PoZwaydh314AofcH8V7ZD8PNut6LgoM4=
=nuZ9
-----END PGP SIGNATURE-----