[poppler] Poppler 21.05.0 released

[Albert Astals Cid]

Available from
http://poppler.freedesktop.org/poppler-21.05.0.tar.xz

The tarball is signed at http://poppler.freedesktop.org/poppler-21.05.0.tar.xz.sig with my key
http://hkps.pool.sks-keyservers.net/pks/lookup?op=get&search=0xCA262C6C83DE4D2FB28A332A3A6A4DB839EAA6D7

Release 21.05.0

core:
 * Fix crashes in malformed files
 * Export SplashFont* symbols used by Scribus
 * Minor code improvements

qt5/qt6:
 * Make sure new signatures are always properly oriented
 * Allow to pass the border width when signing

glib:
 * Enhance find to support multi-line matching

utils:
 * pdftoppm: Fix regression when using single scaleTo. Issue #1062

build system:
 * Allow to disable building manual tests


This release was brought to you by Albert Astals Cid, Evangelos Foutras, Nelson Benítez León, Volker Krause and everyone else that filed bugs or helped with code reviews :)

Testing, patches and bug reports welcome.

Cheers,
  Albert