Improve python3 build dependency
Resolves: #1896335

Rebase poppler to 20.11.0
Modify/remove patches as needed
Resolves: #1644423

Fix crash on broken file in tilingPatternFill()
Resolves: #1801341

Coverity scan related fixes
Related: #1618766

Check whether input is RGB in PSOutputDev::checkPageSlice()
also when using "-optimizecolorspace" flag
Resolves: #1697576

Check whether input is RGB in PSOutputDev::checkPageSlice()
Resolves: #1697576

Ignore dict Length if it is broken
Resolves: #1733027

Fail gracefully if not all components of JPEG2000Stream
have the same size
Resolves: #1723505

Implement crypto functions using NSS
Resolves: #1618766

Fix stack overflow on broken file
Resolves: #1691887

Constrain number of cycles in rescale filter
Compute correct coverage values for box filter
Resolves: #1688418

Fix possible crash on broken files in ImageStream::getLine()
Resolves: #1685268

Check Catalog from XRef for being a Dict
Resolves: #1677347

Move the fileSpec.dictLookup call inside fileSpec.isDict if
Resolves: #1677028

Do not try to construct invalid rich media annotation assets
Resolves: #1677025

Defend against requests for negative XRef indices
Resolves: #1673699