textproc/zxing-cpp: Update to 3.0.2
Release notes: https://github.com/zxing-cpp/zxing-cpp/releases/tag/v3.0.0
https://github.com/zxing-cpp/zxing-cpp/releases/tag/v3.0.1 https://github.com/zxing-cpp/zxing-cpp/releases/tag/v3.0.2
PR: 293675
Co-authored-by: Daniel Engberg <diizzy@FreeBSD.org>