print/libharu: adopt and update to 2.4.3 release (+)
Changelogs since 2.3.0 release:
https://github.com/libharu/libharu/releases/tag/v2.4.0 https://github.com/libharu/libharu/releases/tag/v2.4.1 https://github.com/libharu/libharu/releases/tag/v2.4.2 https://github.com/libharu/libharu/releases/tag/v2.4.3