build: require sxplayer 9.4.0
build: require sxplayer 9.4.0

sxplayer 9.4.0 introduced new color characteristics fields in the
sxplayer_frame structure, which are now needed by node.gl to handle
color conversions properly.

gopro/gopro-lib-node.gl,gopro/gopro-lib-node.gl,gopro/gopro-lib-node.gl,gopro/gopro-lib-node.gl