SDL-mixer 0.6.3.0

Only display out-of-date packages.

10 Reverse deps	Accepted versions
astrds	>=0.5 && <0.7
Eternal10Seconds	-any
fallingblocks	>=0.5.5
gridland	-any
haskanoid	-any
hbeat	-any
intricacy	==0.6.*
keera-posture	-any
TeaHS	-any
YACPong	-any