manual intervention required (xorgproto dependency errors)

due to some recent changes in arch, manual intervention may be required if you hit any errors of the form:

:: installing xorgproto (2019.2-2) breaks dependency * required by *

to correct dependency errors related to 'xorgproto':

# pacman -Qi libdmx      &>1 && pacman -Rdd libdmx
# pacman -Qi libxxf86dga &>1 && pacman -Rdd libxxf86dga
# pacman -Syu