community/netpbm: upgrade to 11.3.0, enable more tests
CHANGE HISTORY
23.06.28 BJH Release 11.03.00
pamstack: Add -firstmaxval, -lcmmaxval
pnmcolormap: make result independent of how system's qsort
orders records with equal keys. Affects pnmquant.
pamtopng: fix typo in error message about -chroma option.
pamtopng, pnmtopng, pngtopam: fix error message when something
fails in libpng. Always broken (the programs were new in Netpbm
8.1 (March 2000)).