[poppler] Poppler 20.12.1 released

[Albert Astals Cid]

Available from
http://poppler.freedesktop.org/poppler-20.12.1.tar.xz

The tarball is signed at http://poppler.freedesktop.org/poppler-20.12.1.tar.xz.sig with my key
http://hkps.pool.sks-keyservers.net/pks/lookup?op=get&search=0xCA262C6C83DE4D2FB28A332A3A6A4DB839EAA6D7

This release mostly fixes a regression if some of the non default flags of pdftops are used.

Release 20.12.1:
core:
 * PSOutputDev: fixing regression in the rasterization code. Issue #1002
 * Add missing profile copy operation in GfxICCBasedColorSpace::copy()
 * Fix issue in broken files

build system:
 * Use modern CMake linking for Qt and boost

This release was brought to you by Albert Astals Cid, Philipp Knechtges and everyone else that filed bugs or helped with code reviews :)

Testing, patches and bug reports welcome.

Cheers,
  Albert