release: bump version to 3.0.2 / 0.5.2

release: bump master version from 3.0.0 to 3.0.1

release: drop the "-rc1" version suffix

README: added new sponsor Socomo Software

README: mention the `ZXING_WRITERS=NEW` build option

Merge pull request #880 from gitlost/hri_update_ais

HRI: update AIs to latest gs1-syntax-dictionary.txt

release: bump project version to 2.2.1

release: update version info to 2.2.0

Release: bump version 2.0.0 -> 2.1.0

README.md: mention c++20 build option / impact