main/jbig2dec: upgrade to 0.20 & rebuild revdeps

$ apk search -r so:libjbig2dec.so.0
jbig2dec-0.19-r3 is required by:
jbig2dec-dev-0.19-r3
ghostscript-10.02.0-r0
mupdf-libs-1.23.3-r1

added 8 commits

• f0e5cbfb...6b54a388 - 5 commits from branch alpine:master
• c24dd49d - main/jbig2dec: upgrade to 0.20
• 249ec534 - main/ghostscript: rebuild against jbig2dec 0.20
• 8eb885ad - community/mupdf: rebuild against jbig2dec 0.20

Compare with previous version

merged