[poppler] Poppler 21.02.0 released

[Albert Astals Cid]

Available from
http://poppler.freedesktop.org/poppler-21.02.0.tar.xz

The tarball is signed at http://poppler.freedesktop.org/poppler-21.02.0.tarxz.sig with my key
http://hkps.pool.sks-keyservers.net/pks/lookup?op=get&search=0xCA262C6C83DE4D2FB28A332A3A6A4DB839EAA6D7

Release 21.02.0
core:
 * GfxCal*ColorSpace: introduce Bradford transform for chromatic adaptation
 * Fix memory leak if saving the file fails
 * Internal code improvements
 * Fix various issues handling broken files
 * Make checkedAdd work for long long in MSVC

qt5:
 * Properly export NewSignatureData class
 * Fix regression in QIODeviceOutStream + MSVC

qt6:
 * Properly export NewSignatureData class
 * Fix regression in QIODeviceOutStream + MSVC

utils:
 * pdftohtml: Fix error() parameter type

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

Testing, patches and bug reports welcome.

Cheers,
  Albert